public static function getConversionGroupUnits($group = NULL) {
		$conversionGroups = array();
		foreach(self::$_conversionUnits as $conversionUnit => $conversionGroup) {
			if ((is_null($group)) || ($conversionGroup['Group'] == $group)) {
				$conversionGroups[$conversionGroup['Group']][] = $conversionUnit;
			}
		}
		return $conversionGroups;
	}
public static function getConversionGroupUnits($group = NULL) {
		$conversionGroups = array();
		foreach(self::$_conversionUnits as $conversionUnit => $conversionGroup) {
			if ((is_null($group)) || ($conversionGroup['Group'] == $group)) {
				$conversionGroups[$conversionGroup['Group']][] = $conversionUnit;
			}
		}
		return $conversionGroups;
	}
public static function getConversionGroupUnits ( $ group = NULL ) { $ conversionGroups = array ( ) ; foreach ( self :: $ _conversionUnits as $ conversionUnit => $ conversionGroup ) { if ( ( is_null ( $ group ) ) || ( $ conversionGroup [ 'Group' ] == $ group ) ) { $ conversionGroups [ $ conversionGroup [ 'Group' ] ] [ ] = $ conversionUnit ; } } return $ conversionGroups ; }
getConversionGroupUnits
Returns an array of units of measure, for a specified conversion group, or for all groups

@param	string	$group	The group whose units of measure you want to retrieve
@return	array
getConversionGroupUnits Returns an array of units of measure for a specified conversion group or for all groups