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larry babby and threejs for glsl
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Sam
229
webGl/my-threejs-test/node_modules/htmlnano/lib/modules/minifyUrls.mjs
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vendored
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229
webGl/my-threejs-test/node_modules/htmlnano/lib/modules/minifyUrls.mjs
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import { optionalImport } from '../helpers.mjs';
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// Adopts from https://github.com/kangax/html-minifier/blob/51ce10f4daedb1de483ffbcccecc41be1c873da2/src/htmlminifier.js#L209-L221
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const tagsHaveUriValuesForAttributes = new Set([
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'a',
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'area',
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'link',
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'base',
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'object',
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'blockquote',
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'q',
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'del',
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'ins',
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'form',
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'input',
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'head',
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'audio',
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'embed',
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'iframe',
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'img',
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'script',
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'track',
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'video',
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]);
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const tagsHasHrefAttributes = new Set([
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'a',
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'area',
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'link',
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'base'
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]);
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const attributesOfImgTagHasUriValues = new Set([
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'src',
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'longdesc',
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'usemap'
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]);
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const attributesOfObjectTagHasUriValues = new Set([
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'classid',
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'codebase',
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'data',
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'usemap'
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]);
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const tagsHasCiteAttributes = new Set([
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'blockquote',
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'q',
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'ins',
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'del'
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]);
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const tagsHasSrcAttributes = new Set([
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'audio',
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'embed',
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'iframe',
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'img',
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'input',
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'script',
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'track',
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'video',
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/**
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* https://html.spec.whatwg.org/#attr-source-src
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*
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* Although most of browsers recommend not to use "src" in <source>,
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* but technically it does comply with HTML Standard.
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*/
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'source'
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]);
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const isUriTypeAttribute = (tag, attr) => {
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return (
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tagsHasHrefAttributes.has(tag) && attr === 'href' ||
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tag === 'img' && attributesOfImgTagHasUriValues.has(attr) ||
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tag === 'object' && attributesOfObjectTagHasUriValues.has(attr) ||
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tagsHasCiteAttributes.has(tag) && attr === 'cite' ||
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tag === 'form' && attr === 'action' ||
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tag === 'input' && attr === 'usemap' ||
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tag === 'head' && attr === 'profile' ||
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tag === 'script' && attr === 'for' ||
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tagsHasSrcAttributes.has(tag) && attr === 'src'
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);
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};
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const isSrcsetAttribute = (tag, attr) => {
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return (
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tag === 'source' && attr === 'srcset' ||
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tag === 'img' && attr === 'srcset' ||
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tag === 'link' && attr === 'imagesrcset'
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);
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};
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const processModuleOptions = options => {
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// FIXME!
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// relateurl@1.0.0-alpha only supports URL while stable version (0.2.7) only supports string
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// should convert input into URL instance after relateurl@1 is stable
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if (typeof options === 'string') return options;
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if (options instanceof URL) return options.toString();
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return false;
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};
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const isLinkRelCanonical = ({ tag, attrs }) => {
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// Return false early for non-"link" tag
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if (tag !== 'link') return false;
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for (const [attrName, attrValue] of Object.entries(attrs)) {
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if (attrName.toLowerCase() === 'rel' && attrValue === 'canonical') return true;
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}
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return false;
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};
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const JAVASCRIPT_URL_PROTOCOL = 'javascript:';
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let relateUrlInstance;
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let STORED_URL_BASE;
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/** Convert absolute url into relative url */
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export default async function minifyUrls(tree, options, moduleOptions) {
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const RelateUrl = await optionalImport('relateurl');
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const srcset = await optionalImport('srcset');
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const terser = await optionalImport('terser');
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let promises = [];
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const urlBase = processModuleOptions(moduleOptions);
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// Invalid configuration, return tree directly
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if (!urlBase) return tree;
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/** Bring up a reusable RelateUrl instances (only once)
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*
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* STORED_URL_BASE is used to invalidate RelateUrl instances,
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* avoiding require.cache acrossing multiple htmlnano instance with different configuration,
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* e.g. unit tests cases.
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*/
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if (!relateUrlInstance || STORED_URL_BASE !== urlBase) {
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if (RelateUrl) {
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relateUrlInstance = new RelateUrl(urlBase);
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}
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STORED_URL_BASE = urlBase;
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}
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tree.walk(node => {
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if (!node.attrs) return node;
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if (!node.tag) return node;
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if (!tagsHaveUriValuesForAttributes.has(node.tag)) return node;
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// Prevent link[rel=canonical] being processed
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// Can't be excluded by isUriTypeAttribute()
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if (isLinkRelCanonical(node)) return node;
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for (const [attrName, attrValue] of Object.entries(node.attrs)) {
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const attrNameLower = attrName.toLowerCase();
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if (isUriTypeAttribute(node.tag, attrNameLower)) {
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if (isJavaScriptUrl(attrValue)) {
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promises.push(minifyJavaScriptUrl(node, attrName, terser));
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} else {
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if (relateUrlInstance) {
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// FIXME!
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// relateurl@1.0.0-alpha only supports URL while stable version (0.2.7) only supports string
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// the WHATWG URL API is very strict while attrValue might not be a valid URL
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// new URL should be used, and relateUrl#relate should be wrapped in try...catch after relateurl@1 is stable
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node.attrs[attrName] = relateUrlInstance.relate(attrValue);
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}
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}
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continue;
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}
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if (isSrcsetAttribute(node.tag, attrNameLower)) {
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if (srcset) {
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try {
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const parsedSrcset = srcset.parse(attrValue, { strict: true });
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node.attrs[attrName] = srcset.stringify(parsedSrcset.map(srcset => {
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if (relateUrlInstance) {
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srcset.url = relateUrlInstance.relate(srcset.url);
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}
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return srcset;
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}));
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} catch (e) {
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// srcset will throw an Error for invalid srcset.
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}
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}
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continue;
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}
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}
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return node;
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});
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if (promises.length > 0) return Promise.all(promises).then(() => tree);
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return Promise.resolve(tree);
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}
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function isJavaScriptUrl(url) {
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return typeof url === 'string' && url.toLowerCase().startsWith(JAVASCRIPT_URL_PROTOCOL);
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}
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const jsWrapperStart = 'function a(){';
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const jsWrapperEnd = '}a();';
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function minifyJavaScriptUrl(node, attrName, terser) {
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if (!terser) return Promise.resolve();
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let result = node.attrs[attrName];
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if (result) {
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result = jsWrapperStart + result.slice(JAVASCRIPT_URL_PROTOCOL.length) + jsWrapperEnd;
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return terser
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.minify(result, {}) // Default Option is good enough
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.then(({ code }) => {
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const minifiedJs = code.substring(
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jsWrapperStart.length,
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code.length - jsWrapperEnd.length
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);
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node.attrs[attrName] = JAVASCRIPT_URL_PROTOCOL + minifiedJs;
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});
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}
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return Promise.resolve();
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}
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