omni::graph::core::AttrKeyHash
Defined in omni/graph/core/Handle.h
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struct AttrKeyHash
Make sure to warn developer if an incompatibility is introduced.
This is here so we can use AttrKey and ConstAttributeDataHandle as a key to std::unordered_map. There is another below in ConstAttributeDataHandleHash, intentionally the same as they represent the same data.
See https://www.techiedelight.com/use-std-pair-key-std-unordered_map-cpp/ for a full discussion.