???<!-- GIF89;a -->
123123123123
.....................................................................................................................................???<!-- GIF89;a -->
123123123123
.....................................................................................................................................--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Returns a new ipaddr built by masking IP address with the given prefixlen/netmask. (e.g. 8, 64, &quot;255.255.255.0&quot;, etc.)
full_name: IPAddr#mask
is_singleton: false
name: mask
params: (prefixlen)
visibility: public