Provided by: libio-handle-util-perl_0.01-2_all 

NAME
IO::Handle::Prototype - base class for callback based handles.
SYNOPSIS
my $fh = IO::Handle::Prototype->new(
getline => sub {
my $fh = shift;
...
},
);
DESCRIPTION
You probably want IO::Handle::Prototype::Fallback instead.
perl v5.26.2 2018-07-01 IO::Handle::Prototype(3pm)