Method _injectChildStyle

packages/runtime-dom/src/apiCustomElement.ts:752–757

* @internal

(
    comp: ConcreteComponent & CustomElementOptions,
    parentComp?: ConcreteComponent,
  )

   * @internal
   */
  _injectChildStyle(
    comp: ConcreteComponent & CustomElementOptions,
    parentComp?: ConcreteComponent,
  ): void {
    this._applyStyles(comp.styles, comp, parentComp)
  }

  /**
   * @internal