1\version "2.19.21"
2
3\header {
4  texidoc = "Three types of double repeat bar line are supported."
5}
6\new StaffGroup <<
7  \new Staff \relative {
8    c'1
9    \mark "\":|:\""
10    \bar ":..:"
11    c1
12    \mark "\":|.|:\""
13    \bar ":|.|:"
14    c1
15    \mark "\":|.:\""
16    \bar ":|.:"
17    c1
18  }
19  \new Staff \relative {
20    \repeat unfold 4 { c'1 }
21  }
22>>
23