def merge(self, node):
self.feature += node.feature;<EOL>for child in node.successors:<EOL><INDENT>child.parent = self;<EOL>self.successors.append(child);<EOL><DEDENT>
!
        @brief Merge non-leaf node to the current.

        @param[in] node (non_leaf_node): Non-leaf node that should be merged with current.