The @search_func is called with a pointer to the key of a key/value
pair in the tree, and the passed in @user_data. If @search_func returns
0 for a key/value pair, then the corresponding node is returned as
the result of g_tree_search(). If @search_func returns -1, searching
will proceed among the key/value pairs that have a smaller key; if
@search_func returns 1, searching will proceed among the key/value
pairs that have a larger key.
Searches a #GTree using @search_func.
The @search_func is called with a pointer to the key of a key/value pair in the tree, and the passed in @user_data. If @search_func returns 0 for a key/value pair, then the corresponding node is returned as the result of g_tree_search(). If @search_func returns -1, searching will proceed among the key/value pairs that have a smaller key; if @search_func returns 1, searching will proceed among the key/value pairs that have a larger key.