store => sub { my ($ref, $data, $key) = @_; ... },
exists => sub { my ($ref, $data, $key) = @_; ... },
delete => sub { my ($ref, $data, $key) = @_; ... },
store => sub { my ($ref, $data, $key) = @_; ... },
exists => sub { my ($ref, $data, $key) = @_; ... },
delete => sub { my ($ref, $data, $key) = @_; ... },