(command.CommandList
  children: [
    (command.AndOr
      ops: [Op_DAmp]
      children: [
        (C {(Lit_Other '[')} 
          {
            (word_part.BracedVarSub
              token: <VSub_Name VARIABLES_ATOM_SH>
              suffix_op: (suffix_op.StringUnary op_id:VTest_Plus arg_word:{(true)})
            )
          } {(Lit_Other ']')}
        )
        (command.ControlFlow token:<ControlFlow_Return return>)
      ]
    )
    (command.Assignment
      keyword: Assign_Declare
      flags: [-g]
      pairs: [(assign_pair lhs:(lhs_expr.LhsName name:VARIABLES_ATOM_SH) op:Equal rhs:{(true)})]
    )
    (C {(.)} 
      {
        (word_part.BracedVarSub
          token: <VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.StringUnary op_id:VOp1_Percent arg_word:{(Lit_Slash /) ('*')})
        ) (/common.sh)
      }
    )
    (C {(.)} 
      {
        (word_part.BracedVarSub
          token: <VSub_Name BASH_SOURCE>
          suffix_op: (suffix_op.StringUnary op_id:VOp1_Percent arg_word:{(Lit_Slash /) ('*')})
        ) (/variables.sh)
      }
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Nil)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Identifier)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Atom)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Boolean)} {(Atom)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(String)} {(Atom)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Number)} {(Atom)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Integer)} {(Number)}
    )
    (C {(variable) (Lit_Other ':') (Lit_Other ':') (type) (Lit_Other ':') (Lit_Other ':') (define)} 
      {(Real)} {(Number)}
    )
    (command.FuncDef
      name: 'variable::Atom::toSexp'
      body: 
        (command.BraceGroup
          children: [
            (C {(variable) (Lit_Other ':') (Lit_Other ':') (value)} {(DQ (${ VSub_Number 1))})
            (command.Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:RESULT)
                  op: Equal
                  rhs: {(${ VSub_Name RESULT)}
                )
              ]
            )
          ]
        )
    )
    (command.FuncDef
      name: 'variable::Identifier::toSexp'
      body: 
        (command.BraceGroup
          children: [
            (C {(variable) (Lit_Other ':') (Lit_Other ':') (value)} {(DQ (${ VSub_Number 1))})
            (command.Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (lhs_expr.LhsName name:RESULT)
                  op: Equal
                  rhs: {(${ VSub_Name RESULT)}
                )
              ]
            )
          ]
        )
    )
    (command.FuncDef
      name: 'variable::Nil::toSexp'
      body: 
        (command.BraceGroup
          children: [
            (command.Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(lhs_expr.LhsName name:RESULT) op:Equal rhs:{(DQ (Nil))})]
            )
          ]
        )
    )
  ]
)