(CommandList
  children: [
    (C {(set)} {(-o)} {(errexit)})
    (C {(set)} {(-o)} {(nounset)})
    (C {(set)} {(-o)} {(pipefail)})
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:KUBE_ROOT)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [(C {(dirname)} {(DQ (${ VSub_Name BASH_SOURCE))})]
                  )
                left_token: <Left_CommandSub '$('>
                spids: [68 76]
              ) (/..)
            }
          spids: [67]
        )
      ]
      spids: [67]
    )
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (C {(Lit_Other '[')} {(-f)} {(DQ (${ VSub_Name KUBE_ROOT) (/cluster/env.sh))} 
                  {(Lit_Other ']')}
                )
              terminator: <Op_Semi ';'>
            )
          ]
          action: [(C {(source)} {(DQ (${ VSub_Name KUBE_ROOT) (/cluster/env.sh))})]
          spids: [16777215 96]
        )
      ]
      spids: [16777215 108]
    )
    (C {(source)} {(DQ (${ VSub_Name KUBE_ROOT) (/cluster/kube-util.sh))})
    (C {(echo)} {(DQ ('Bringing down cluster using provider: ') ($ VSub_Name '$KUBERNETES_PROVIDER'))})
    (C {(verify-prereqs)})
    (C {(verify-kube-binaries)})
    (C {(kube-down)})
    (C {(echo)} {(DQ (Done))})
  ]
)