gtk:tree-model-iter-n-children (model iter)

model -- a gtk:tree-model object
iter -- a gtk:tree-iter iterator, or nil

The integer with the number of children of iter.

Returns the number of children that iter has. As a special case, if iter is nil, then the number of toplevel nodes is returned. The gtk:tree-model implementation is deprecated since 4.10. Please do not use it in newly written code.