Short-circuiting Hiera?

:hierarchy:
  - level1
  - level2
  - level3

level1:

ary:
  - a
  - b
  - c

level2:

ary:
  - b
  - c
  - d

level3:

ary:
  - c
  - d
  - e

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# Any way to tell Hiera 'stop at level2' so that hiera_array('ary') => ['b','c','d','e] ?
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