The Moose metaclass API provides a C<make_immutable()> method. Calling
this method does two things to your class. First, it makes it
faster. In particular, object construction and destruction are
-effectively "inlined" in your class, and no longer invokes the meta
+effectively "inlined" in your class, and no longer invoke the meta
API.
Second, you can no longer make changes via the metaclass API, such as