bool run(OperationContext* opCtx,
             const string& dbname,
             const BSONObj& cmdObj,
             BSONObjBuilder& result) {
        RoleName roleName;
        PrivilegeVector privilegesToRemove;
        Status status = auth::parseAndValidateRolePrivilegeManipulationCommands(
            cmdObj, "revokePrivilegesFromRole", dbname, &roleName, &privilegesToRemove);
        uassertStatusOK(status);

        ServiceContext* serviceContext = opCtx->getClient()->getServiceContext();
        stdx::lock_guard<stdx::mutex> lk(getAuthzDataMutex(serviceContext));

        AuthorizationManager* authzManager = AuthorizationManager::get(serviceContext);
        status = requireWritableAuthSchema28SCRAM(opCtx, authzManager);
        uassertStatusOK(status);

        if (RoleGraph::isBuiltinRole(roleName)) {
            uasserted(ErrorCodes::InvalidRoleModification,
                      str::stream() << roleName.getFullName()
                                    << " is a built-in role and cannot be modified.");
        }

        BSONObj roleDoc;
        status = authzManager->getRoleDescription(opCtx,
                                                  roleName,
                                                  PrivilegeFormat::kShowSeparate,
                                                  AuthenticationRestrictionsFormat::kOmit,
                                                  &roleDoc);
        uassertStatusOK(status);

        PrivilegeVector privileges;
        status = auth::parseAndValidatePrivilegeArray(BSONArray(roleDoc["privileges"].Obj()),
                                                      &privileges);
        uassertStatusOK(status);

        for (PrivilegeVector::iterator itToRm = privilegesToRemove.begin();
             itToRm != privilegesToRemove.end();
             ++itToRm) {
            for (PrivilegeVector::iterator curIt = privileges.begin(); curIt != privileges.end();
                 ++curIt) {
                if (curIt->getResourcePattern() == itToRm->getResourcePattern()) {
                    curIt->removeActions(itToRm->getActions());
                    if (curIt->getActions().empty()) {
                        privileges.erase(curIt);
                    }
                    break;
                }
            }
        }

        // Build up update modifier object to $set privileges.
        mutablebson::Document updateObj;
        mutablebson::Element setElement = updateObj.makeElementObject("$set");
        status = updateObj.root().pushBack(setElement);
        uassertStatusOK(status);
        mutablebson::Element privilegesElement = updateObj.makeElementArray("privileges");
        status = setElement.pushBack(privilegesElement);
        uassertStatusOK(status);
        status = Privilege::getBSONForPrivileges(privileges, privilegesElement);
        uassertStatusOK(status);

        audit::logRevokePrivilegesFromRole(Client::getCurrent(), roleName, privilegesToRemove);

        BSONObjBuilder updateBSONBuilder;
        updateObj.writeTo(&updateBSONBuilder);
        status = updateRoleDocument(opCtx, roleName, updateBSONBuilder.done());
        // Must invalidate even on bad status - what if the write succeeded but the GLE failed?
        authzManager->invalidateUserCache();
        uassertStatusOK(status);
        return true;
    }