public static Builder from(URL swaggerURL){
  Validate.notNull(swaggerURL,"swaggerURL must not be null");
  return new Builder(swaggerURL);
}

public static Builder from ( URL swaggerURL ) { Validate . notNull ( swaggerURL , "swaggerURL must not be null" ) ; return new Builder ( swaggerURL ) ; }
creates a swagger2markupconverter . builder using a remote url .
