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rOACCT/node_modules/core-js/modules/esnext.reflect.delete-metadata.js
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esnext.reflect.delete-metadata.js
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			var $ = require('../internals/export');
			var ReflectMetadataModule = require('../internals/reflect-metadata');
			var anObject = require('../internals/an-object');

			var toMetadataKey = ReflectMetadataModule.toKey;
			var getOrCreateMetadataMap = ReflectMetadataModule.getMap;
			var store = ReflectMetadataModule.store;

			// `Reflect.deleteMetadata` method
			// https://github.com/rbuckton/reflect-metadata
			$({ target: 'Reflect', stat: true }, {
			deleteMetadata: function deleteMetadata(metadataKey, target /* , targetKey */) {
			var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);
			var metadataMap = getOrCreateMetadataMap(anObject(target), targetKey, false);
			if (metadataMap === undefined \|\| !metadataMap['delete'](metadataKey)) return false;
			if (metadataMap.size) return true;
			var targetMetadata = store.get(target);
			targetMetadata['delete'](targetKey);
			return !!targetMetadata.size \|\| store['delete'](target);
			}
			});