onRowHasChildToggled
open fun onRowHasChildToggled(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (path: TreePath, iter: TreeIter) -> Unit): <Error class: unknown class>
This signal is emitted when a row has gotten the first child row or lost its last child row.
Parameters
connectFlags
a combination of ConnectFlags
handler
the Callback to connect. Params: path a GtkTreePath identifying the row; iter a valid GtkTreeIter pointing to the row