Minor. [platformStatic] used

core/descriptors/src/org/jetbrains/jet/lang/types/CommonSupertypes.java

@@ -96,7 +96,7 @@ public class CommonSupertypes {
         }
 
         if (!hasFlexible) return commonSuperTypeForInflexible(types, recursionDepth, maxDepth);
-        return DelegatingFlexibleType.OBJECT$.create(
+        return DelegatingFlexibleType.create(
                 commonSuperTypeForInflexible(lower, recursionDepth, maxDepth),
                 commonSuperTypeForInflexible(upper, recursionDepth, maxDepth),
                 KotlinPackage.single(capabilities) // mixing different capabilities is not supported

core/descriptors/src/org/jetbrains/jet/lang/types/TypeSubstitutor.java

@@ -163,7 +163,7 @@ public class TypeSubstitutor {
                     unsafeSubstitute(new TypeProjectionImpl(originalProjectionKind, flexibility.getUpperBound()), recursionDepth + 1);
             // todo: projection kind is neglected
             return new TypeProjectionImpl(originalProjectionKind,
-                                          DelegatingFlexibleType.OBJECT$.create(
+                                          DelegatingFlexibleType.create(
                                                   substitutedLower.getType(),
                                                   substitutedUpper.getType(),
                                                   flexibility.getExtraCapabilities()

core/descriptors/src/org/jetbrains/jet/lang/types/flexibleTypes.kt

@@ -19,6 +19,7 @@ package org.jetbrains.jet.lang.types
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker
 import org.jetbrains.jet.lang.types.Approximation.DataFlowExtras
 import org.jetbrains.jet.lang.resolve.name.FqName
+import kotlin.platform.platformStatic
 
 public trait FlexibleTypeCapabilities {
     fun <T: TypeCapability> getCapability(capabilityClass: Class<T>, jetType: JetType, flexibility: Flexibility): T?
@@ -119,7 +120,7 @@ public open class DelegatingFlexibleType protected (
         override val extraCapabilities: FlexibleTypeCapabilities
 ) : DelegatingType(), NullAwareness, Flexibility, Approximation {
     class object {
-        fun create(lowerBound: JetType, upperBound: JetType, extraCapabilities: FlexibleTypeCapabilities): JetType {
+        platformStatic fun create(lowerBound: JetType, upperBound: JetType, extraCapabilities: FlexibleTypeCapabilities): JetType {
             if (lowerBound == upperBound) return lowerBound
             return DelegatingFlexibleType(lowerBound, upperBound, extraCapabilities)
         }

core/serialization/src/org/jetbrains/jet/descriptors/serialization/TypeDeserializer.java

@@ -106,7 +106,7 @@ public class TypeDeserializer {
 
             if (capabilities == null) return ErrorUtils.createErrorType(new DeserializedType(proto) + ": Capabilities not found for id " + id);
 
-            return DelegatingFlexibleType.OBJECT$.create(
+            return DelegatingFlexibleType.create(
                     new DeserializedType(proto),
                     new DeserializedType(proto.getFlexibleUpperBound()),
                     capabilities