src/Model/Invoice/Item.php
public function getUnits()
    {
        return [
            self::UNIT_NONE   => 'None',
            self::UNIT_MINUTE => 'Minutes',
            self::UNIT_HOUR   => 'Hours',
            self::UNIT_DAY    => 'Days',
            self::UNIT_WEEK   => 'Weeks',
            self::UNIT_MONTH  => 'Months',
            self::UNIT_YEAR   => 'Years',
        ];
    }
public function getUnits()
    {
        return [
            self::UNIT_NONE   => 'None',
            self::UNIT_MINUTE => 'Minutes',
            self::UNIT_HOUR   => 'Hours',
            self::UNIT_DAY    => 'Days',
            self::UNIT_WEEK   => 'Weeks',
            self::UNIT_MONTH  => 'Months',
            self::UNIT_YEAR   => 'Years',
        ];
    }
public function getUnits ( ) { return [ self :: UNIT_NONE => 'None' , self :: UNIT_MINUTE => 'Minutes' , self :: UNIT_HOUR => 'Hours' , self :: UNIT_DAY => 'Days' , self :: UNIT_WEEK => 'Weeks' , self :: UNIT_MONTH => 'Months' , self :: UNIT_YEAR => 'Years' , ] ; }
Returns the item quantity units with human friendly names

@return array
Returns the item quantity units with human friendly names