1\header { texidoc = "Deeply nested system braces, brackets, etc., may be
2  created with the @code{systemStartDelimiterHierarchy} property."
3}
4
5\version "2.19.21"
6
7\paper {
8  ragged-right = ##t
9}
10
11\new StaffGroup
12\relative <<
13  \set StaffGroup.systemStartDelimiterHierarchy
14    = #'(SystemStartSquare (SystemStartBracket a (SystemStartSquare b c)) d)
15  \new Staff { c'1 }
16  \new Staff { c1 }
17  \new Staff { c1 }
18  \new Staff { c1 }
19  \new Staff { c1 }
20  >>
21