code: func (s *ShowDiagnosticsStatement) String() string {
  	var buf bytes.Buffer
  	_, _ = buf.WriteString("SHOW DIAGNOSTICS")
  	if s.Module != "" {
  		_, _ = buf.WriteString(" FOR ")
  		_, _ = buf.WriteString(QuoteString(s.Module))
  	}
  	return buf.String()
  }
docs: // String returns a string representation of the ShowDiagnosticsStatement.