void (@NotNull PsiElement element, @NotNull String newName, @NotNull MultiMap<PsiElement, String> conflicts) { PyElement container = PsiTreeUtil.getParentOfType(element, ScopeOwner.class); if (container instanceof PyFile pyFile) { PyClass conflictingClass = pyFile.findTopLevelClass(newName); if (conflictingClass != null) { conflicts.putValue(conflictingClass, "A class named '" + newName + "' is already defined in " + pyFile.getName()); } PyFunction conflictingFunction = pyFile.findTopLevelFunction(newName); if (conflictingFunction != null) { conflicts.putValue(conflictingFunction, "A function named '" + newName + "' is already defined in " + pyFile.getName()); } PyTargetExpression conflictingVariable = pyFile.findTopLevelAttribute(newName); if (conflictingVariable != null) { conflicts.putValue(conflictingFunction, "A variable named '" + newName + "' is already defined in " + pyFile.getName()); } } else if (container instanceof PyClass pyClass) { PyClass conflictingClass = pyClass.findNestedClass(newName, true); if (conflictingClass != null) { conflicts.putValue(conflictingClass, "A class named '" + newName + "' is already defined in class '" + pyClass.getName() + "'"); } PyFunction conflictingFunction = pyClass.findMethodByName(newName, true, null); if (conflictingFunction != null) { conflicts.putValue(conflictingFunction, "A function named '" + newName + "' is already defined in class '" + pyClass.getName() + "'"); } PyTargetExpression conflictingAttribute = pyClass.findClassAttribute(newName, true, null); if (conflictingAttribute != null) { conflicts.putValue(conflictingAttribute, "An attribute named '" + newName + "' is already defined in class '" + pyClass.getName() + "'"); } } }