code: public boolean isModified()
      {
          for (int iFieldSeq = 0; iFieldSeq < m_vFieldInfo.size(); iFieldSeq++)
          {
              if (this.getField(iFieldSeq).isModified())
                  return true;
          }
          return false;
      }
docs: Have any fields Changed?
  Note: The thin version (this one) keeps a flag for changes, the thick version surveys the fields.
  @return true if any fields have changed.