static get styles() {
    return css`
      :host {
        display: block;
      }

      :host([hidden]) {
        display: none;
      }

      .-busy,
      [disabled] {
        cursor: not-allowed;
      }

      .form-checkbox > .label.-busy {
        opacity: 0.75;
      }
    `;
  }
/**
   * Return the array of styles to apply to the element.
   *
   * @see https://lit-element.polymer-project.org/guide/styles#style-the-component-itself
   */
Return the array of styles to apply to the element.
Return the array of styles to apply to the element .
static get styles() {
    return css`
      :host {
        display: block;
      }
      :host([hidden]) {
        display: none;
      }
      .-busy,
      [disabled] {
        cursor: not-allowed;
      }
      .form-checkbox > .label.-busy {
        opacity: 0.75;
      }
    `;
  }
static get styles ( ) { return css ` ` ; }
Return the array of styles to apply to the element.
Return the array of styles to apply to the element .