text: /**
   * Copyright (c) Facebook, Inc. and its affiliates.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * 
   * @format
   */
  // flowlint ambiguous-object-type:error
  'use strict';
  
  var _require = require('../core/Schema'),
      create = _require.create;
  
  var schemaCache = new Map();
  
  function getSchemaInstance(getSchemaSource, getSchemaExtensions, schemaExtensions) {
    var source = getSchemaSource();
    var schema = schemaCache.get(source);
  
    if (schema == null) {
      schema = create(source, getSchemaExtensions(), schemaExtensions);
      schemaCache.set(source, schema);
    }
  
    return schema;
  }
  
  module.exports = getSchemaInstance;