[boost] Status of Disjoint Sets ?

Disjoint Sets is in the last few releases, has it's own test suite and github archive, but isn't mentioned on the documentation page? An oversight, or intentional? https://www.boost.org/doc/libs/1_69_0/ I see a defect that says it should move into Graph, is that part of the puzzle? https://github.com/boostorg/disjoint_sets/issues Brian