code: protected ParsingError error( ErrorCode errorCode, ErrorDetails... details ) {
  		return new ParsingError(
  				errorCode,
  				this.context.getCommandFile(),
  				this.line,
  				details );
  	}
docs: A shortcut method to create a parsing error with relevant information.
  @param errorCode an error code
  @param details (can be null)
  @return a new parsing error