my %METAS;
+if(Mouse::Util::_MOUSE_XS){
+ # register meta storage for performance
+ Mouse::Util::__register_metaclass_storage(\%METAS, 0);
+
+ # ensure thread safety
+ *CLONE = sub { Mouse::Util::__register_metaclass_storage(\%METAS, 1) };
+}
+
sub _metaclass_cache { # DEPRECATED
my($class, $name) = @_;
return $METAS{$name};