$fileSet= $path->find(
  name => qr/.../,
  size => '>=4000',
  dir_filter => sub($d) { ... },
);

# Throws an exception unless MIME::Detect is installed
$fileSet= $fileSet->find(mime_type => 'text/plain');

my $iter= $fileSet->iter;  # depth-first, unless parameter "bfs" given
while (&$iter) {
   ...
}

# if the list is known to be small
my @files= $fileSet->all;