//Sets arbiturary user data for node
func (node *CMarkNode) SetNodeUserData(userData interface{}) bool {
return success(C.cmark_node_set_user_data(node.node,
unsafe.Pointer(&userData)))
}
//Sets arbitrary user data for node
func (node *CMarkNode) SetNodeUserData(userData string) bool {
cstr := C.CString(userData)
res := C.cmark_node_set_user_data(node.node, unsafe.Pointer(&cstr))
return success(res)
}