You can use Class::MOP to figure this out pretty easily.

my @methods = Class::MOP::Class->initialize('My::Package')->get_all_me
+thods;
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• name - the local method name
• package_name - the package where the method is defined
• fully_qualified_name - the package name + name
• body - returns the code ref

See Class::Inspector for one fairly easy method...

use Class::Inspector;
use Data::Dump qw( dump );
print dump( Class::Inspector->methods( 'Foo' ) )."\n";
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Also, Ovid has just written Class::Sniff, which he detailed in a series of blog posts:

1. Class::C3 Wierdness?
2. What Did I just Write?
3. Class::Sniff Now Detects "Unreachable" Methods
4. Class::Sniff Reporting and Exported "Methods"
5. Class::Sniff Now Detects "Duplicate" Methods
6. Detecting Long Methods Without PPI
7. Class::Sniff Notes

Not all of these entries relate directly to your problem, but I always find it interesting to follow the train of thought of module authors while they're initially developing a module.

Class/Object Method Lister