addAlias('amp'); $ampere->addAlias('amps'); $ampere->addAlias('ampere'); $ampere->addAlias('amperes'); static::addUnit($ampere); static::addMissingSIPrefixedUnits( $ampere, 1, '%pA', [ '%Pamp', '%Pamps', '%Pampere', '%Pamperes' ] ); } }