void clear_selected_children() { return; }
int get_selected_layer_parameter_count()const { return 0; }
LayerParamList get_selected_layer_parameters()const { return LayerParamList(); }
LayerParam get_selected_layer_parameter()const { return LayerParam(); }
void clear_selected_children() { return; }
int get_selected_layer_parameter_count()const { return 0; }
LayerParamList get_selected_layer_parameters()const { return LayerParamList(); }
LayerParam get_selected_layer_parameter()const { return LayerParam(); }