code: function ( number, pluralRules ) {
  			var i,
  				pluralForms = [ 'zero', 'one', 'two', 'few', 'many', 'other' ],
  				pluralFormIndex = 0;
  
  			for ( i = 0; i < pluralForms.length; i++ ) {
  				if ( pluralRules[pluralForms[i]] ) {
  					if ( pluralRuleParser( pluralRules[pluralForms[i]], number ) ) {
  						return pluralFormIndex;
  					}
  
  					pluralFormIndex++;
  				}
  			}
  
  			return pluralFormIndex;
  		}
docs: For the number, get the plural for index
  
  @param number
  @param pluralRules
  @return plural form index