code: protected void setFilterForm(FilterForm filterForm) {
  		if (this.filterForm != null) {
  			validationResultsModel.remove(this.filterForm.getFormModel()
  					.getValidationResults());
  		}
  
  		this.filterForm = filterForm;
  
  		if (this.filterForm != null) {
  			validationResultsModel.add(filterForm.getFormModel()
  					.getValidationResults());
  		}
  	}
docs: Set the form to use as filter.
  
  @see DataProvider#supportsFiltering()