removed moronic nullable

platform/core-api/src/com/intellij/psi/util/CachedValueProvider.java

@@ -94,6 +94,7 @@ public interface CachedValueProvider<T> {
      * Creates a result
      * @see #getDependencyItems()
      */
+    @NotNull
     public static <T> Result<T> createSingleDependency(@Nullable T value, @NotNull Object dependency) {
       return create(value, dependency);
     }
@@ -102,6 +103,7 @@ public interface CachedValueProvider<T> {
      * Creates a result
      * @see #getDependencyItems()
      */
+    @NotNull
     public static <T> Result<T> create(@Nullable T value, @NotNull Object... dependencies) {
       return new Result<>(value, dependencies);
     }
@@ -110,6 +112,7 @@ public interface CachedValueProvider<T> {
      * Creates a result
      * @see #getDependencyItems()
      */
+    @NotNull
     public static <T> Result<T> create(@Nullable T value, @NotNull Collection<?> dependencies) {
       return new Result<>(value, ArrayUtil.toObjectArray(dependencies));
     }

platform/core-api/src/com/intellij/psi/util/ParameterizedCachedValueProvider.java

@@ -15,9 +15,7 @@
  */
 package com.intellij.psi.util;
 
-import org.jetbrains.annotations.Nullable;
-
+@FunctionalInterface
 public interface ParameterizedCachedValueProvider<ResultType, ParameterType> {
-  @Nullable
   CachedValueProvider.Result<ResultType> compute(ParameterType param);
 }

python/psi-api/src/com/jetbrains/python/codeInsight/PyCustomMember.java

@@ -181,7 +181,6 @@ public class PyCustomMember extends UserDataHolderBase {
     if (myTypeName != null) {
 
       final ParameterizedCachedValueProvider<PyClass, PsiElement> provider = new ParameterizedCachedValueProvider<PyClass, PsiElement>() {
-        @Nullable
         @Override
         public CachedValueProvider.Result<PyClass> compute(
           final PsiElement param) {

xml/impl/src/com/intellij/xml/actions/EscapeEntitiesAction.java

@@ -24,7 +24,6 @@ import com.intellij.xml.Html5SchemaProvider;
 import com.intellij.xml.util.XmlUtil;
 import gnu.trove.TIntObjectHashMap;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 /**
  * @author Dennis.Ushakov
@@ -32,7 +31,6 @@ import org.jetbrains.annotations.Nullable;
 public class EscapeEntitiesAction extends BaseCodeInsightAction implements CodeInsightActionHandler {
   private static final ParameterizedCachedValueImpl<TIntObjectHashMap<String>, PsiFile> ESCAPES = new ParameterizedCachedValueImpl<TIntObjectHashMap<String>, PsiFile>(
     new ParameterizedCachedValueProvider<TIntObjectHashMap<String>, PsiFile>() {
-      @Nullable
       @Override
       public CachedValueProvider.Result<TIntObjectHashMap<String>> compute(PsiFile param) {
         final XmlFile file = XmlUtil.findXmlFile(param, Html5SchemaProvider.getCharsDtdLocation());