code: private static function getStandardType($name = null)
      {
          if (self::$standardTypes === null) {
              self::$standardTypes = [
                  self::ID      => new IDType(),
                  self::STRING  => new StringType(),
                  self::FLOAT   => new FloatType(),
                  self::INT     => new IntType(),
                  self::BOOLEAN => new BooleanType(),
              ];
          }
  
          return $name ? self::$standardTypes[$name] : self::$standardTypes;
      }
docs: @param string $name
  
  @return (IDType|StringType|FloatType|IntType|BooleanType)[]|IDType|StringType|FloatType|IntType|BooleanType