(command.CommandList
  children: [
    (C {<set>} {<-o>} {<errexit>})
    (C {<set>} {<-o>} {<nounset>})
    (C {<set>} {<-o>} {<pipefail>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:KUBE_ROOT)
          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (command_sub
                  left_token: <Id.Left_DollarParen '$('>
                  child: (C {<dirname>} {(DQ (${ Id.VSub_Name BASH_SOURCE))})
                ) <'/..'>
              )
            }
          spids: [81]
        )
      ]
    )
    (C {<source>} {(DQ (${ Id.VSub_Name KUBE_ROOT) <'/build/common.sh'>)})
    (C 
      {<kube> <Id.Lit_Colon ':'> <Id.Lit_Colon ':'> <build> <Id.Lit_Colon ':'> <Id.Lit_Colon ':'> 
        <verify_prereqs>
      }
    )
    (C 
      {<kube> <Id.Lit_Colon ':'> <Id.Lit_Colon ':'> <build> <Id.Lit_Colon ':'> <Id.Lit_Colon ':'> 
        <build_image>
      }
    )
  ]
)