XBRL-Instance.php
public function getUnit( $id )
	{
		return isset( $this->units[ $id ] ) ? $this->units[ $id ] : null;
	}
public function getUnit( $id )
	{
		return isset( $this->units[ $id ] ) ? $this->units[ $id ] : null;
	}
public function getUnit ( $ id ) { return isset ( $ this -> units [ $ id ] ) ? $ this -> units [ $ id ] : null ; }
Get a specific unit
@param string $id The id of the unit to retrieve
@return string|null
Get a specific unit