Perform a three-way merge of
$ qbt mergeManifests --lhs lhs-qbt-manifest --rhs rhs-qbt-manfiest --mhs mhs-qbt-manifest --lhsName LHS --rhsName RHS --mhsName MHS
See Common Options for options shared by most or all commands.
qbt mergeManifests is a tool you can invoke to manually merge arbitrary
qbt-manifest files. Generally, users do not invoke mergeManifests directly but rather set up the mergeDriver as outlined in the Developing With QBT.