Method _setValueGetter

packages/context/src/binding.ts:719–726

* Set the `_getValue` function * @param getValue - getValue function

(getValue: ValueFactory<T>)

   * @param getValue - getValue function
   */
  private _setValueGetter(getValue: ValueFactory<T>) {
    // Clear the cache
    this._clearCache();
    this._getValue = resolutionCtx => {
      return getValue(resolutionCtx);
    };
    this.emitChangedEvent('value');
  }

  /**
   * Bind the key to a constant value. The value must be already available