E.g. [x1, y1, z1, ..., x9, y9, z9] —> [x9, y9, z9, ..., x1, y1, z1]
or: [1, 2, 3, 4, 5, 6] —> [4, 5, 6, 1, 2, 3]
If the input array has a bad length (not dividable by 3), e.g. [1, 2, 3, 4, 5, 6, 7] (length: 4) or [1, 2, 3, 4, 5, 6, 7, 8] (length: 5), the last values which cannot form a triple will be cut off, in both cases the reversed array would be [4, 5, 6, 1, 2, 3] (trimmed).

If the array does not consist of triplets you probably want to use the regular Ops.Array.ArrayReverse op.