Names of all kotlinx.rpc.protoc.ProtoSourceSets this task is associated with.
For Kotlin/JVM it has only one source set (main, or test, for example).
For Kotlin/Multiplatform it also has only one source set (commonMain, commonTest, or jsMain, for example).
For Android, Kotlin/Android, and Kotlin/Multiplatform + Android it can have multiple source sets:
["androidMain", "androidDebug", "main", "debug"]["androidTest", "androidUnitTestDebug", "test", "testDebug"]