Function deinit [src]
Free the backing storage of the map, as well as all
of the stored keys and values.
  Prototype
 pub fn deinit(self: *EnvMap) void  Parameters
self: *EnvMap Source
 pub fn deinit(self: *EnvMap) void {
    var it = self.hash_map.iterator();
    while (it.next()) |entry| {
        self.free(entry.key_ptr.*);
        self.free(entry.value_ptr.*);
    }
    self.hash_map.deinit();
}