Branch :
require Socket.Buf
Socket.Buf
a = %Socket.Buf{}
%Socket.Buf{addr: (Ptr) 0,
addr_len: (U32) 0,
addr_str: "",
sockfd: (S64) -1,
buf_rw: %BufRW{r: (Ptr) 0,
w: (Ptr) 0}}
a.buf_rw
%BufRW{r: (Ptr) 0,
w: (Ptr) 0}