Calling class methods from a metaclass

The following:

    #!/usr/bin/env perl
    use strict;
    use warnings;

    package MyClass;
    {
      use Moose;

      sub hello_class {
        my $class = shift;
        return  "Hello $class\n";
      }
    }

    print "1: ", MyClass->hello_class(), "\n";

    my $myclass = Class::MOP::get_metaclass_by_name('MyClass');

    print "2: ", $myclass->hello_class(), "\n";


Gives:

    1: Hello MyClass

    Can't locate object method "hello_class" via package
"Moose::Meta::Class" at ./example.pl line 19.


Is there any way to call a class method when I don't know the package
name at runtime?

Thanks,
Dan