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rOACCT/node_modules/@babel/preset-env/lib/polyfills/babel-polyfill.js
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babel-polyfill.js
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			"use strict";

			Object.defineProperty(exports, "__esModule", {
			value: true
			});
			exports.default = _default;
			var _utils = require("./utils");
			const BABEL_POLYFILL_DEPRECATION = `
			\`@babel/polyfill\` is deprecated. Please, use required parts of \`core-js\`
			and \`regenerator-runtime/runtime\` separately`;
			const NO_DIRECT_POLYFILL_IMPORT = `
			When setting \`useBuiltIns: 'usage'\`, polyfills are automatically imported when needed.
			Please remove the direct import of \`SPECIFIER\` or use \`useBuiltIns: 'entry'\` instead.`;
			function _default({
			template
			}, {
			regenerator,
			deprecated,
			usage
			}) {
			return {
			name: "preset-env/replace-babel-polyfill",
			visitor: {
			ImportDeclaration(path) {
			const src = (0, _utils.getImportSource)(path);
			if (usage && (0, _utils.isPolyfillSource)(src)) {
			console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
			if (!deprecated) path.remove();
			} else if (src === "@babel/polyfill") {
			if (deprecated) {
			console.warn(BABEL_POLYFILL_DEPRECATION);
			} else if (regenerator) {
			path.replaceWithMultiple(template.ast`
			import "core-js";
			import "regenerator-runtime/runtime.js";
			`);
			} else {
			path.replaceWith(template.ast`
			import "core-js";
			`);
			}
			}
			},
			Program(path) {
			path.get("body").forEach(bodyPath => {
			const src = (0, _utils.getRequireSource)(bodyPath);
			if (usage && (0, _utils.isPolyfillSource)(src)) {
			console.warn(NO_DIRECT_POLYFILL_IMPORT.replace("SPECIFIER", src));
			if (!deprecated) bodyPath.remove();
			} else if (src === "@babel/polyfill") {
			if (deprecated) {
			console.warn(BABEL_POLYFILL_DEPRECATION);
			} else if (regenerator) {
			bodyPath.replaceWithMultiple(template.ast`
			require("core-js");
			require("regenerator-runtime/runtime.js");
			`);
			} else {
			bodyPath.replaceWith(template.ast`
			require("core-js");
			`);
			}
			}
			});
			}
			}
			};
			}

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