public static function toBinaryOperator($assignment)
    {
        return isset(self::$toBinaryOperatorMap[$assignment]) ? self::$toBinaryOperatorMap[$assignment] : null;
    }
public static function toBinaryOperator($assignment)
    {
        return isset(self::$toBinaryOperatorMap[$assignment]) ? self::$toBinaryOperatorMap[$assignment] : null;
    }
public static function toBinaryOperator ( $ assignment ) { return isset ( self :: $ toBinaryOperatorMap [ $ assignment ] ) ? self :: $ toBinaryOperatorMap [ $ assignment ] : null ; }
Returns the equivalent binary operator of the supplied assignment operator
or null if there is no equivalent.

@param string $assignment

@return string|null
Returns the equivalent binary operator of the supplied assignment operator or null if there is no equivalent .