[AA] Document analyzeInDependedAnalysisSession and related classes

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/KtAnalysisSession.kt

@@ -73,6 +73,12 @@ public abstract class KtAnalysisSession(final override val token: KtLifetimeToke
 
     override val analysisSession: KtAnalysisSession get() = this
 
+    /**
+     * Creates a new [KtAnalysisSession] which depends on this analysis session, but additionally provides its own symbols derived from
+     * analyzing [elementToReanalyze].
+     *
+     * @see analyzeInDependedAnalysisSession
+     */
     public abstract fun createContextDependentCopy(originalKtFile: KtFile, elementToReanalyze: KtElement): KtAnalysisSession
 
     internal val smartCastProvider: KtSmartCastProvider get() = smartCastProviderImpl

analysis/analysis-api/src/org/jetbrains/kotlin/analysis/api/analyze.kt

@@ -43,7 +43,14 @@ public inline fun <R> analyze(
     return sessionProvider.analyze(useSiteKtModule, action)
 }
 
-
+/**
+ * Executes the given [action] in the context of a [KtAnalysisSession] that depends on an original analysis session determined by
+ * [originalFile]. In addition to the symbols provided by the original analysis session, the dependent analysis session provides its own
+ * symbols derived from analyzing [elementToReanalyze]. This allows analyzing some new or copied (and modified) element in the larger
+ * context of the original analysis session.
+ *
+ * @see KtAnalysisSession.createContextDependentCopy
+ */
 public inline fun <R> analyzeInDependedAnalysisSession(
     originalFile: KtFile,
     elementToReanalyze: KtElement,

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/LLFirResolveSessionDepended.kt

@@ -32,6 +32,14 @@ import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.analysis.low.level.api.fir.util.originalDeclaration
 
+/**
+ * An [LLFirResolveSession] which *depends* on an [originalFirResolveSession], but can provide its own FIR elements and symbols selectively.
+ * The dependent session mostly provides FIR elements and symbols from the original resolve session, but additionally provides FIR elements
+ * (and their associated symbols) from its own [ktToFirMapping].
+ *
+ * [LLFirResolveSessionDepended] is used by on-air resolve to provide FIR elements for a copied declaration in the larger context of the
+ * original resolve session.
+ */
 internal class LLFirResolveSessionDepended(
     val originalFirResolveSession: LLFirResolvableResolveSession,
     val towerProviderBuiltUponElement: FirTowerContextProvider,