NAME
Net::WebSocket::Frame:ping:
SYNOPSIS
my $frm = Net::WebSocket::Frame::ping->new(
    #Optional, can be either empty (default) or four random bytes
    mask => q<>,
    payload => $payload,
);
$frm->get_type();           #"ping"
$frm->is_control();   #1
my $mask = $frm->get_mask_bytes();
my $payload = $frm->get_payload();
my $serialized = $frm->to_bytes();
Note that, as per RFC 6455, ping messages can have only up to 125 bytes in their payload.