* Add search source to example plugin.
* Add uiSetting for fields API.
* Update SearchSource to support fields API.
* [PoC] reading from the fields API in Discover
* Add N fields as a default column
* Make fields column non-removeable
* Do not add 'fields' to state
* Remove fields from app state and read from source when needed
* Remove fields column if a new column is added
* Add search source to example plugin.
* Add uiSetting for fields API.
* Update SearchSource to support fields API.
* Improve error handling in search examples plugin.
* Add unit tests for legacy behavior.
* Remove uiSettings feature flag; add fieldsFromSource config.
* Rewrite flatten() based on final API design.
* Update example app based on final API design.
* Update maps app to use legacy fieldsFromSource.
* Update Discover to use legacy fieldsFromSource.
* Rename source filters to field filters.
* Address feedback.
* Update generated docs.
* Update maps functional test.
* Formatting fields column similar to _source
* Moving logic for using search API to updating search source
* Fix small merge error
* Move useSource switch to Discover section of advanced settings
* Do not use fields and source at the same time
* Remove unmapped fields switch
* Add basic support for grouping multifields
* Remove output.txt
* Fix some merge leftovers
* Fix some merge leftovers
* Fix merge errors
* Fix typescript errors and update nested fields logic
* Add a unit test
* Fixing field formats
* Fix multifield selection logic
* Request all fields from source
* Fix eslint
* Fix default columns when switching between _source and fields
* More unit tests
* Update API changes
* Add unit test for discover field details footer
* Remove unused file
* Remove fields formatting from index pattern
* Remove unnecessary check
* Addressing design comments
* Fixing fields column display and renaming it to Document
* Adding more unit tests
* Adding a missing check for useNewFieldsAPI; minor fixes
* Fixing typescript error
* Remove unnecessary console statement
* Add missing prop
* Fixing import order
* Adding functional test to test fields API
* [Functional test] Clean up in after
* Fixing context app
* Addressing PR comments
* Updating failed snapshot
* Addressing PR comments
* Fixing i18n translations, updating type
* Addressing PR comments
* Updating a functional test
* Add a separate functional test for fields API
* Read fields from source in a functional test
* Skip buggy test
* Use default behavior in functional tests
* Fixing remaining failing tests
* Fixing date-nanos test
* Updating FLS test
* Fixing yet another functional test
* Skipping non-relevant tests
* Fixing more tests
* Update stub import in test
* Fix import
* Fix invalid import
Co-authored-by: Luke Elmers <luke.elmers@elastic.co>
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
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