avl-tree-createavl-tree-create is an alias for `avl-tree--create' in `
avl-tree.el'. (avl-tree-create ARG1) This function has a compiler macro `avl-tree--create--cmacro'. Create an empty AVL tree. COMPARE-FUNCTION is a function which takes two arguments, A and B, and returns non-nil if A is less than B, and nil otherwise.