text: 'use strict';
  
  if( 'hasLetter' in Object.prototype === false ) {
      /**
       * @summary Returns true if the element contains letters.
       * @returns {Boolean}
       * @example 'hello world'.hasLetters() // true
       * @example '42 - 7 = ??'.hasLetter() // false
       * @since 0.1.0
       * @see https://cdn.rawgit.com/stellar-labs/prototype-storm/master/dist/has-letter.min.js
       * @see https://github.com/stellar-labs/prototype-storm/blob/master/src/js/has-letter.js
       * @see https://github.com/stellar-labs/prototype-storm/blob/master/test/has-letter.js
       */ 
      Object.prototype.hasLetter = function() {
          // String
          if( this.constructor === String ) {
              return /[\p{Alphabetic}]/gu.test(this);
          }
      };
  }
  
  export default Object.prototype.hasLetter;