function required(rule, value, source, errors, options, type) {
	  if (rule.required && (!source.hasOwnProperty(rule.field) || util.isEmptyValue(value, type || rule.type))) {
	    errors.push(util.format(options.messages.required, rule.fullField));
	  }
	}
/**
	 *  Rule for validating required fields.
	 *
	 *  @param rule The validation rule.
	 *  @param value The value of the field on the source object.
	 *  @param source The source object being validated.
	 *  @param errors An array of errors that this rule may add
	 *  validation errors to.
	 *  @param options The validation options.
	 *  @param options.messages The validation messages.
	 */
Rule for validating required fields.
@param rule The validation rule.
@param value The value of the field on the source object.
@param source The source object being validated.
@param errors An array of errors that this rule may add
validation errors to.
@param options The validation options.
@param options.messages The validation messages.
Rule for validating required fields . @param rule The validation rule . @param value The value of the field on the source object . @param source The source object being validated . @param errors An array of errors that this rule may add validation errors to . @param options The validation options . @param options . messages The validation messages .
function required(rule, value, source, errors, options, type) {
	  if (rule.required && (!source.hasOwnProperty(rule.field) || util.isEmptyValue(value, type || rule.type))) {
	    errors.push(util.format(options.messages.required, rule.fullField));
	  }
	}
function required ( rule , value , source , errors , options , type ) { if ( rule . required && ( ! source . hasOwnProperty ( rule . field ) || util . isEmptyValue ( value , type || rule . type ) ) ) { errors . push ( util . format ( options . messages . required , rule . fullField ) ) ; } }
Rule for validating required fields.
Rule for validating required fields .