_styleMaker() {
    const submenuLabelStyle = this.getStyle('submenu.label');
    const submenuPartitionStyle = this.getStyle('submenu.partition');

    return style({
      subMenuLabelActive: submenuLabelStyle.active,
      subMenuLabelNormal: submenuLabelStyle.normal,
      submenuPartitionVertical: submenuPartitionStyle.vertical,
      submenuPartitionHorizontal: submenuPartitionStyle.horizontal,
      biSize: this.getStyle('common.bisize'),
      subMenuRangeTitle: this.getStyle('range.title'),
      submenuRangePointer: this.getStyle('range.pointer'),
      submenuRangeBar: this.getStyle('range.bar'),
      submenuRangeSubbar: this.getStyle('range.subbar'),

      submenuDisabledRangePointer: this.getStyle('range.disabledPointer'),
      submenuDisabledRangeBar: this.getStyle('range.disabledBar'),
      submenuDisabledRangeSubbar: this.getStyle('range.disabledSubbar'),

      submenuRangeValue: this.getStyle('range.value'),
      submenuColorpickerTitle: this.getStyle('colorpicker.title'),
      submenuColorpickerButton: this.getStyle('colorpicker.button'),
      submenuCheckbox: this.getStyle('checkbox'),
      menuIconSize: this.getStyle('menu.iconSize'),
      submenuIconSize: this.getStyle('submenu.iconSize'),
      menuIconStyle: this.getStyle('menu.icon'),
      submenuIconStyle: this.getStyle('submenu.icon'),
    });
  }
Make css resource
@returns {string} - serialized css text
@private