The current method can only create nodes one level at a time, adding the method of creating nodes step by step. If there is no parent node, create the parent node first
Coverage decreased (-1.07%) to 78.539% when pulling 4aa7aea356623ba9a1beca56fe3bbd90208168b2 on aidelingyu:master into 2cc03de413da42869e2db7ce7965d3e978d917eb on samuel:master.
Coverage decreased (-1.1%) to 78.475% when pulling 4aa7aea356623ba9a1beca56fe3bbd90208168b2 on aidelingyu:master into 2cc03de413da42869e2db7ce7965d3e978d917eb on samuel:master.
The current method can only create nodes one level at a time, adding the method of creating nodes step by step. If there is no parent node, create the parent node first