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use strict; use v5.10; ... $a->deposit( amount => 50 ); say $a->balance;
'PositiveInt' could not be parsed to a type constraint - maybe you nee +d to pre-declare the type with class_type at /home/moose/perl5/lib/pe +rl5/MooseX/Declare/Syntax/MethodDeclaration.pm line 40