public function HasField ($fieldOrFieldName = NULL) {
		$fieldName = NULL;
		if ($fieldOrFieldName instanceof \MvcCore\Ext\Forms\IField) {
			$fieldName = $fieldOrFieldName->GetName();
		} else if (is_string($fieldOrFieldName)) {
			$fieldName = $fieldOrFieldName;
		}
		return isset($this->fields[$fieldName]);
	}
public function HasField ($fieldOrFieldName = NULL) {
		$fieldName = NULL;
		if ($fieldOrFieldName instanceof \MvcCore\Ext\Forms\IField) {
			$fieldName = $fieldOrFieldName->GetName();
		} else if (is_string($fieldOrFieldName)) {
			$fieldName = $fieldOrFieldName;
		}
		return isset($this->fields[$fieldName]);
	}
public function HasField ( $ fieldOrFieldName = NULL ) { $ fieldName = NULL ; if ( $ fieldOrFieldName instanceof \ MvcCore \ Ext \ Forms \ IField ) { $ fieldName = $ fieldOrFieldName -> GetName ( ) ; } else if ( is_string ( $ fieldOrFieldName ) ) { $ fieldName = $ fieldOrFieldName ; } return isset ( $ this -> fields [ $ fieldName ] ) ; }
If `TRUE` if given field instance or given
field name exists in form, `FALSE` otherwise.
@param \MvcCore\Ext\Forms\IField|string $fieldOrFieldName
@return bool
If TRUE if given field instance or given field name exists in form FALSE otherwise .