(CommandList
  children: [
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (C {(Lit_Other "[")} {(KW_Bang "!")} {(-f)} {(support/apply-reviews.py)} {(Lit_Other "]")})
              terminator: <Op_Semi ";">
            )
          ]
          action: [
            (C {(echo)} {(SQ <"Please run this script from the root of Mesos source directory.">)})
            (C {(exit)} {(1)})
          ]
          spids: [-1 17]
        )
      ]
      spids: [-1 31]
    )
    (C {(exec)} {(python)} {(support/apply-reviews.py)} {(DQ ($ VSub_At "$@"))})
  ]
)