text: /*
    Copyright 2018 Google LLC
  
    Use of this source code is governed by an MIT-style
    license that can be found in the LICENSE file or at
    https://opensource.org/licenses/MIT.
  */
  
  module.exports = (options, schema) => {
    const {value, error} = schema.validate(options, {
      language: {
        object: {
          allowUnknown: 'is not a supported parameter.',
        },
      },
    });
  
    if (error) {
      throw error;
    }
  
    return value;
  };
  