text: // TODO: Remove from `core-js@4`
  var $ = require('../internals/export');
  var ReflectMetadataModule = require('../internals/reflect-metadata');
  var anObject = require('../internals/an-object');
  
  var toMetadataKey = ReflectMetadataModule.toKey;
  var ordinaryDefineOwnMetadata = ReflectMetadataModule.set;
  
  // `Reflect.defineMetadata` method
  // https://github.com/rbuckton/reflect-metadata
  $({ target: 'Reflect', stat: true }, {
    defineMetadata: function defineMetadata(metadataKey, metadataValue, target /* , targetKey */) {
      var targetKey = arguments.length < 4 ? undefined : toMetadataKey(arguments[3]);
      ordinaryDefineOwnMetadata(metadataKey, metadataValue, anObject(target), targetKey);
    }
  });
  