def show_field_mapping(self):
        """Show InaSAFE Field Mapping."""
        from safe.gui.tools.field_mapping_dialog import FieldMappingDialog
        dialog = FieldMappingDialog(
            parent=self.iface.mainWindow(),
            iface=self.iface,)
        if dialog.exec_():  # modal
            LOGGER.debug('Show field mapping accepted')
            self.dock_widget.layer_changed(self.iface.activeLayer())
        else:
            LOGGER.debug('Show field mapping not accepted')
Show InaSAFE Field Mapping.