proc library-function {
  echo 'library line 2 in library-function'
}
# library line 4
# library line 5
(CommandList
  children: [
    (FuncDef
      name: library-function
      body: 
        (BraceGroup
          children: [(C {(echo)} {(SQ <"library line 2 in library-function">)})]
          spids: [4]
        )
      spids: [0 3]
    )
  ]
)