xt/check-signatures.t doesn't understand class $.variables

[coke]

Given

my role X::Proc::Async is Exception {
    has Proc::Async $.proc;
}

in the source, and this in the docs:

=head2 method proc

    method proc(X::Proc::Async:D --> Proc::Async)

this fails:

➜  doc git:(main) ✗ RAKUDO_SRC=/Users/coke/sandbox/rakudo xt/check-signatures.rakutest doc/Type/X/Proc/Async.rakudoc
1..1
# Subtest: check X::Proc::Async methods
    1..1
    ok 1 - # SKIP X::Proc::Async.proc not found on X::Proc::Async
ok 1 - check X::Proc::Async methods

(OK, it SKIPs, but it should pass cleanly) - it doesn't realize that a getter is created for that class

[coke]

Note - this is shown as a method in the source, but it's not a method. Perhaps the fix is to document it like https://docs.raku.org/type/IO/Handle#method_chomp