Documentation for method subname assembled from the following types:

class Backtrace::Frame

From Backtrace::Frame

(Backtrace::Frame) method subname

Defined as:

method subname(Backtrace::Frame:D --> Str)

Returns the name of the enclosing subroutine.

my $bt = Backtrace.new;
my $btf = $bt[0];
say $btf.subname;