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 my $accessroles;                                
   
...
      }
   }

my $self = shift;
...
   
   return $accessroles;

CREATE OR REPLACE PACKAGE Mrf_Maint AS
   TYPE mrf_role IS REF CURSOR; 
...

END Mrf_Maint;
/

CREATE OR REPLACE PACKAGE BODY Mrf_Maint
...
/