Improved implementation of collectInto methods in TreeEquiSet.
Improved implementation of collectInto methods in TreeEquiSet.

rahulkavale/scalatest,triggerNZ/scalatest,janekdb/scalatest,flicken/scalatest,matterche/scalatest,SRGOM/scalatest,gcberger/scalatest,rfries/scalatest,rahulkavale/scalatest,rfries/scalatest,gcberger/scalatest,gcberger/scalatest,rfries/scalatest,flicken/scalatest,SRGOM/scalatest,gcberger/scalatest,janekdb/scalatest,rahulkavale/scalatest,triggerNZ/scalatest,matterche/scalatest,SRGOM/scalatest,janekdb/scalatest,flicken/scalatest,janekdb/scalatest,rfries/scalatest,rahulkavale/scalatest,triggerNZ/scalatest,triggerNZ/scalatest,flicken/scalatest,SRGOM/scalatest,matterche/scalatest,matterche/scalatest