TensorStore
tensorstore::ComposeOptionalTransforms
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    #include "tensorstore/index_space/index_transform.h"
    Result<IndexTransform<>>
    tensorstore::ComposeOptionalTransforms(IndexTransform<> b_to_c,
                                           
    IndexTransform<> a_to_b);

    Composes two index transforms, which may be null.

    • If a_to_b is null, returns b_to_c.

    • If b_to_c is null, returns a_to_b.

    • Otherwise, returns ComposeTransforms(b_to_c, a_to_b).