In searchview xml, Write the <superbar> tag,
position: [left, right]
view_mode: [kanban,tree, pivot, graph view.]
parent_key: key field name of parent child relation. leave blank would auto set.
level: how many level to expend the tree for initialize. Default is 2
limit: how many record to show ztree. Default is 16
order: the field name to order by
domain: set the domain for data, eg: [[('is_company', '=', 1)]]