XBRL-DFR.php
public function supportedFeatures( $feature = null )
	{
		return $feature
			? ( isset( $this->features[ $feature ] ) ? $this->features[ $feature ] : array() )
			: $this->featrues;
	}
public function supportedFeatures( $feature = null )
	{
		return $feature
			? ( isset( $this->features[ $feature ] ) ? $this->features[ $feature ] : array() )
			: $this->featrues;
	}
public function supportedFeatures ( $ feature = null ) { return $ feature ? ( isset ( $ this -> features [ $ feature ] ) ? $ this -> features [ $ feature ] : array ( ) ) : $ this -> featrues ; }
Gets an array containing a list of extra features supported usually by descendent implementation
@param string $feature (optional) If supplied just the array for the feature is returned or all
features.  If supplied and not found an empty array is returned
@return array By default there are no additional features so the array is empty
Gets an array containing a list of extra features supported usually by descendent implementation