code: @Override
      public void setSubmittedValue(final Object submittedValue) {
          if (submittedValue == null) {
              submittedValues.clear();
          }
          else {
              submittedValues = (Map<SheetRowColIndex, String>) submittedValue;
          }
  
      }
docs: /*
  (non-Javadoc)
  @see javax.faces.component.EditableValueHolder#setSubmittedValue(java.lang .Object)