file-api-fileSetIndexes
-----------------------

* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" "sources" and
  "interfaceSources" objects gained new ``fileSetIndexes`` fields to support
  sources belonging to multiple file sets. The ``fileSetIndex`` fields are
  maintained for backwards compatibility only, and users are advised to port
  to the new fields.
* The :manual:`cmake-file-api(7)` "codemodel" version 2 "target" "sources"
  object gained a new ``backtraces`` field to represent multiple command
  invocations which associate a single source for a given target with multiple
  file sets. The ``backtrace`` field is maintained for backwards compatibility
  only, and users are advised to port to the new field.