private boolean isListElementDeclaration(
     PsiStatement statement, PsiVariable listVariable, String indexName, PsiType type) {
   if (!(statement instanceof PsiDeclarationStatement)) {
     return false;
   }
   final PsiDeclarationStatement declarationStatement = (PsiDeclarationStatement) statement;
   final PsiElement[] declaredElements = declarationStatement.getDeclaredElements();
   if (declaredElements.length != 1) {
     return false;
   }
   final PsiElement declaredElement = declaredElements[0];
   if (!(declaredElement instanceof PsiVariable)) {
     return false;
   }
   final PsiVariable variable = (PsiVariable) declaredElement;
   final PsiExpression initializer = variable.getInitializer();
   if (!isListGetLookup(initializer, indexName, listVariable)) {
     return false;
   }
   return type != null && type.equals(variable.getType());
 }
 @Nullable
 private String createCollectionIterationText(@NotNull PsiForStatement forStatement)
     throws IncorrectOperationException {
   final PsiStatement body = forStatement.getBody();
   final PsiStatement firstStatement = getFirstStatement(body);
   final PsiStatement initialization = forStatement.getInitialization();
   if (!(initialization instanceof PsiDeclarationStatement)) {
     return null;
   }
   final PsiDeclarationStatement declaration = (PsiDeclarationStatement) initialization;
   final PsiElement declaredIterator = declaration.getDeclaredElements()[0];
   if (!(declaredIterator instanceof PsiVariable)) {
     return null;
   }
   final PsiVariable iteratorVariable = (PsiVariable) declaredIterator;
   final PsiMethodCallExpression initializer =
       (PsiMethodCallExpression) iteratorVariable.getInitializer();
   if (initializer == null) {
     return null;
   }
   final PsiType iteratorType = initializer.getType();
   if (iteratorType == null) {
     return null;
   }
   final PsiType iteratorContentType = extractContentTypeFromType(iteratorType);
   final PsiType iteratorVariableType = iteratorVariable.getType();
   final PsiType contentType;
   final PsiClassType javaLangObject = TypeUtils.getObjectType(forStatement);
   if (iteratorContentType == null) {
     final PsiType iteratorVariableContentType =
         extractContentTypeFromType(iteratorVariableType);
     if (iteratorVariableContentType == null) {
       contentType = javaLangObject;
     } else {
       contentType = iteratorVariableContentType;
     }
   } else {
     contentType = iteratorContentType;
   }
   final PsiReferenceExpression methodExpression = initializer.getMethodExpression();
   final PsiExpression collection = methodExpression.getQualifierExpression();
   final String iteratorName = iteratorVariable.getName();
   final boolean isDeclaration =
       isIteratorNextDeclaration(firstStatement, iteratorName, contentType);
   final PsiStatement statementToSkip;
   @NonNls final String finalString;
   final String contentVariableName;
   if (isDeclaration) {
     final PsiDeclarationStatement declarationStatement =
         (PsiDeclarationStatement) firstStatement;
     assert declarationStatement != null;
     final PsiElement[] declaredElements = declarationStatement.getDeclaredElements();
     final PsiElement declaredElement = declaredElements[0];
     if (!(declaredElement instanceof PsiVariable)) {
       return null;
     }
     final PsiVariable variable = (PsiVariable) declaredElement;
     contentVariableName = variable.getName();
     statementToSkip = declarationStatement;
     if (variable.hasModifierProperty(PsiModifier.FINAL)) {
       finalString = "final ";
     } else {
       finalString = "";
     }
   } else {
     if (collection instanceof PsiReferenceExpression) {
       final PsiReferenceExpression referenceExpression = (PsiReferenceExpression) collection;
       final String collectionName = referenceExpression.getReferenceName();
       contentVariableName = createNewVariableName(forStatement, contentType, collectionName);
     } else {
       contentVariableName = createNewVariableName(forStatement, contentType, null);
     }
     final Project project = forStatement.getProject();
     final CodeStyleSettings codeStyleSettings = CodeStyleSettingsManager.getSettings(project);
     if (codeStyleSettings.GENERATE_FINAL_LOCALS) {
       finalString = "final ";
     } else {
       finalString = "";
     }
     statementToSkip = null;
   }
   final String contentTypeString = contentType.getCanonicalText();
   @NonNls final StringBuilder out = new StringBuilder();
   out.append("for(");
   out.append(finalString);
   out.append(contentTypeString);
   out.append(' ');
   out.append(contentVariableName);
   out.append(": ");
   if (!contentType.equals(javaLangObject)) {
     @NonNls final String iterableTypeString = "java.lang.Iterable<" + contentTypeString + '>';
     if (iteratorContentType == null) {
       out.append('(');
       out.append(iterableTypeString);
       out.append(')');
     }
   }
   if (collection == null) {
     out.append("this");
   } else {
     out.append(collection.getText());
   }
   out.append(')');
   replaceIteratorNext(
       body, contentVariableName, iteratorName, statementToSkip, out, contentType);
   return out.toString();
 }