AssertCustomFieldsWritable

import { Injectable } from '@nestjs/common';import { ModuleRef } from '@nestjs/core';import { Injector, RequestContext } from '@vendure/core';import { assertCustomFieldsWritable, McpToolHandler } from '@vendure/mcp-sdk';type UpdateCustomerInput = { id: string; customFields?: Record<string, unknown> };@Injectable()export class UpdateCustomerTool implements McpToolHandler<UpdateCustomerInput> {    constructor(private readonly moduleRef: ModuleRef) {}    async execute(ctx: RequestContext, input: UpdateCustomerInput) {        await assertCustomFieldsWritable(            ctx,            new Injector(this.moduleRef),            'Customer',            input.customFields,        );        // ...write the customer    }}

function assertCustomFieldsWritable(ctx: RequestContext, injector: Injector, entityName: keyof CustomFields, input: Record<string, unknown> | undefined): Promise<void>