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Jason Rhinelander authored
reference_internal requires an `instance` field to track the returned reference's parent, but that's just a duplication of what keep_alive<0,1> does, so use a keep alive to do this to eliminate the duplication.
f2ecd892
reference_internal requires an `instance` field to track the returned reference's parent, but that's just a duplication of what keep_alive<0,1> does, so use a keep alive to do this to eliminate the duplication.