如何取消订阅输入法文本内容的变化

import { inputMethodEngine } from '@kit.IMEKit';
import { BusinessError } from '@kit.BasicServicesKit';
/**
 * 取消订阅文本内容变化
 */
static removeInputTextChanged() {
  try {
    inputMethodEngine.getKeyboardDelegate().off('textChange');
  } catch (err) {
    let error = err as BusinessError;
    console.error(`KeyboardUtil-removeInputTextChanged-异常 ~ code: ${error.code} -·- message: ${error.message}`);
  }
}