docs: public boolean isCommitted() {
          // 182383
          if (_headersWritten) {
  
              if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE))
                  logger.logp(Level.FINE, CLASS_NAME, "isCommitted" , "headersWritten=true","["+this+"]");
  
              return true;
          }
          // 182383
  
          // LIBERTY if (_gotWriter || _gotOutputStream) {
          if (_gotOutputStream)
          {
              // LIBERTY if (_responseBuffer == null)
              // LIBERTY return false;
              if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE))
                  logger.logp(Level.FINE, CLASS_NAME, "isCommitted" , "responseBuffer isCommitted="+_response.isCommitted(),"["+this+"]");
  
              // LIBERTY return _responseBuffer.isCommitted();
              return _response.isCommitted();
          }
          if (_gotWriter && _bufferedWriter != null)
          {
              return _bufferedWriter.isCommitted();
          }
          else
          {
              if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE))
                  logger.logp(Level.FINE, CLASS_NAME, "isCommitted" , "false","["+this+"]");
              return false;
          }
      }