 [det]list_to_rbtree(+List, 
-Tree)Tree is the red-black tree corresponding to the mapping in List, 
which should be a list of Key-Value pairs. List should not 
contain more than one entry for each distinct key, but this is not 
validated by list_to_rbtree/2.
[det]list_to_rbtree(+List, 
-Tree)Tree is the red-black tree corresponding to the mapping in List, 
which should be a list of Key-Value pairs. List should not 
contain more than one entry for each distinct key, but this is not 
validated by list_to_rbtree/2.