# if key is not present.
#
# !!! Warning !!! There is a currently a bug in the delete method that occurs rarely
# but often enough, especially in large datasets. It is currently under investigation.
#
# Complexity: O(log n)
#
# map = Containers::TreeMap.new
# map.push("MA", "Massachusetts")
# map.push("GA", "Georgia")
# map.min_key #=> "GA"```