setCollapsed(collapsed) {
    if (!this.collapsible_ || this.collapsed_ === collapsed) {
      return;
    }
    this.handleToggle_();
  }
Collapse or expand the overview map according to the passed parameter. Will
not do anything if the overview map isn't collapsible or if the current
collapsed state is already the one requested.
@param {boolean} collapsed True if the widget is collapsed.
@api