public void begin(String header,int bias){
  begin();
  m_out.print(header);
  m_bias=bias;
}

public void begin ( String header , int bias ) { begin ( ) ; m_out . print ( header ) ; m_bias = bias ; }
begin the xml document . this must be called before any other formatting methods . this method prints an xml header into the top of the output stream , plus additional header text provided by the client
