{
    package My::Class;
    {
      use strict;
      use Class::Std;
      my %_handler_map :ATTR; # Holds trigger names and states.

      # ... further down
      # ===========================================================================
      # METHOD:   register_handler(%registration_hash)
      # REQUIRES: A hash with the following parameters ...
      #   trigger: The state which triggers the handler.
      #   handler: The name space string (Triggered::Handler)  which is triggered.
      # RETURNS:  
      #   true:  If the trigger and handler both are present and are stored.
      #   false: If the trigger or handler are not valid (present).
      #   other: An error is thrown if the trigger and handler are valid but
      #   but they do not get stored.
      # 
      # PURPOSE: Register state handlers and triggers.
      # ---------------------------------------------------------------------------
      sub register_state
      {
        my ($self, %arguments) = @_;

        my $trigger = $arguments{'trigger'} || return(undef());
        my $handler = $arguments{'handler'} || return(undef());

        # ... Here is the part I am having problems with.
        $_handler_map{ident($self)}{$trigger} = $handler;

        # Do error checking here.  Throw an error if needed.
        return(1);
      }
    }    
}

my $state_arguments = { 'form_data' => {} };
my $state_manager = My::Class->new($state_arguments);
$state_manager->register_state(
    'trigger' => 'welcome',
    'handler' => 'Handler::Welcome',
)