Refactor and document DisplaySourceSet, deprecate SelfRepresentingSingletonSet (#3105)

* Deprecate internal API SelfRepresentingSingletonSet for removal as being harmful and unimplement it in DisplaySourceSet
* Provide no automatic migration for DisplaySourceSet, as there are no mechanisms for that. Manual migration is the replacement of 'dss' to `setOf(dss)` where applicable
* Introduce a convenience-member DefaultRenderer.buildContentNode to avoid wrapping DSS into set manually
* Document DisplaySourceSet
* Replace Iterable<DisplaySourceSet>.sourceSetIDs with more straightforward Iterable<DisplaySourceSet>.computeSourceSetIds(), refactor all the usages, save some allocations
* Start caching CompositeSourceSetID properties to avoid excessive allocations
* Update integration tests on the latest revision with Knit version where the workaround is applied

Fixes #2897

1 files changed, 2 insertions, 2 deletions

diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/kotlin/SerializationGradleIntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/kotlin/SerializationGradleIntegrationTest.kt
index 126899b2..ff929391 100644
--- a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/kotlin/SerializationGradleIntegrationTest.kt
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/kotlin/SerializationGradleIntegrationTest.kt
@@ -15,8 +15,8 @@ class SerializationGradleIntegrationTest(override val versions: BuildVersions) :
         @get:JvmStatic
         @get:Parameterized.Parameters(name = "{0}")
         val versions = BuildVersions.permutations(
-            gradleVersions = listOf("7.4.2"),
-            kotlinVersions = listOf("1.7.10")
+            gradleVersions = listOf("7.6.1"),
+            kotlinVersions = listOf("1.9.0")
         )
     }