FIR rename: isNullable -> isMarkedNullable

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirRenderer.kt

@@ -583,7 +583,7 @@ class FirRenderer(builder: StringBuilder) : FirVisitorVoid() {
     }
 
     override fun visitTypeWithNullability(typeWithNullability: FirTypeWithNullability) {
-        if (typeWithNullability.isNullable) {
+        if (typeWithNullability.isMarkedNullable) {
             print("?")
         }
     }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/types/FirTypeWithNullability.kt

@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.fir.types
 import org.jetbrains.kotlin.fir.visitors.FirVisitor
 
 interface FirTypeWithNullability : FirType {
-    val isNullable: Boolean
+    val isMarkedNullable: Boolean
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R =
         visitor.visitTypeWithNullability(this, data)

compiler/fir/tree/src/org/jetbrains/kotlin/fir/types/impl/FirAbstractAnnotatedType.kt

@@ -16,7 +16,7 @@ import org.jetbrains.kotlin.fir.visitors.FirTransformer
 abstract class FirAbstractAnnotatedType(
     final override val session: FirSession,
     final override val psi: PsiElement?,
-    final override val isNullable: Boolean
+    final override val isMarkedNullable: Boolean
 ) : FirTypeWithNullability {
     override val annotations = mutableListOf<FirAnnotationCall>()
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/types/impl/FirResolvedFunctionTypeImpl.kt

@@ -20,7 +20,7 @@ import org.jetbrains.kotlin.fir.visitors.FirTransformer
 class FirResolvedFunctionTypeImpl(
     override val psi: PsiElement?,
     override val session: FirSession,
-    override val isNullable: Boolean,
+    override val isMarkedNullable: Boolean,
     override val annotations: MutableList<FirAnnotationCall>,
     override var receiverType: FirType?,
     override val valueParameters: MutableList<FirValueParameter>,

compiler/fir/tree/src/org/jetbrains/kotlin/fir/types/impl/FirResolvedTypeImpl.kt

@@ -15,6 +15,6 @@ class FirResolvedTypeImpl(
     override val session: FirSession,
     override val psi: PsiElement?,
     override val type: ConeKotlinType,
-    override val isNullable: Boolean,
+    override val isMarkedNullable: Boolean,
     override val annotations: List<FirAnnotationCall>
 ) : FirResolvedType