[perl #66810] [BUG] Perl6::Grammar does not support ^methods()

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# New Ticket Created by  Elliot Shank 
# Please include the string:  [perl #66810]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=66810 >


The code below results in an error:

    Method '!.^' not found for invocant of class 'Perl6;Grammar'

-----

my $file = $*PROGRAM_NAME;

my $handle = open $file;

my $source_code = $handle.slurp();

my $parse_tree = Perl6::Grammar.parse($source_code);

for $parse_tree.^methods() {
    say ">$_< {$_.PARROT()}";
} # end for