move node_base_options to separate file
move node_base_options to separate file
release get_parent and get (child) function in node_tree class
update test
remove temporary file
rename functions
is root function
fix is root function
release get_parent and get (child) function in page_tree class
convert structure to template class and release some blank function in tree class
remove node_position_hash
add template parameter to structure type
change const function to static
release get_parent and get (child) function
update test