grantDeleteProcess.js

import("Context_lib");
import("system.vars");
import("system.result");
import("Entity_lib");

var rowId = vars.get("$field.DISTRICTRESPONSIBLEID");
var currentContext = ContextUtils.getCurrentContextId();

var canDelete = new HasLinkedObjectTester()
    .andNoEntityRows("DistrictContact_entity", "DistrictContacts", {ObjectId_param : currentContext, RowId_param : rowId}) //District Contact
    .andNoEntityRows("Document_entity", "Documents", {AssignmentTable_param : "DISTRICTRESPONSIBLE", AssignmentRowId_param : rowId}) //Documents
    .validate();

result.string(canDelete);