text: 'use strict';
  
  SPK
  
  .Module('eFields', [], [null, {
  $: {
  
      _fields: {},
  
      get: function(fields_name)
      {
          if (!(fields_name in this._fields)) {
              throw new Error('Fields `' + fields_name +
                      '` does not exist.');
          }
  
          return this._fields[fields_name];
      },
  
      set: function(fields_name, fields)
      {
          this._fields[fields_name] = fields;
      }
  
  }}]);
  