code: protected function isStaticMethod($name)
      {
          $interface = new ReflectionClass($this->interface);
          if (! $interface->hasMethod($name)) {
              return false;
          }
  
          return $interface->getMethod($name)->isStatic();
      }
docs: Checks whether a method is static or not.
  
  @param string $name Method name
  
  @return bool true if method is static, else false