- Implement ChangeOps per rules documented in T198105 (and researched in T196554#4291641)
- Abstract statement merging logic from the way it is done for items, reuse for lexemes and forms
Wikibase\Repo\ChangeOp\ChangeOpsMerge::generateStatementsChangeOps
Note:
For ChangeOps in the lexeme api we introduced ChangeOpApplyException which allows for localized errors to be emitted from ChangeOps