private static @Nullable PsiFileSystemItem resolveRelativeImportFromModuleLocation(@NotNull PyFile context,
                                                                           @NotNull String moduleLocation,
                                                                           @Nullable PyReferenceExpression referenceExpr,
                                                                           int relativeLevel) {
    String relativeImportBasePath = VirtualFileManager.extractPath(moduleLocation);
    for (int level = 0; level < relativeLevel; level++) {
      relativeImportBasePath = PathUtil.getParentPath(relativeImportBasePath);
    }
    if (!relativeImportBasePath.isEmpty()) {
      final String protocol = VirtualFileManager.extractProtocol(moduleLocation);
      assert protocol != null : "Original location: " + moduleLocation;
      final String relativeImportBaseUrl = VirtualFileManager.constructUrl(protocol, relativeImportBasePath);
      VirtualFile relativeImportBaseDir = VirtualFileManager.getInstance().findFileByUrl(relativeImportBaseUrl);
      VirtualFile sourceFile = relativeImportBaseDir;
      if (relativeImportBaseDir != null && relativeImportBaseDir.isDirectory() && referenceExpr != null) {
        final QualifiedName qualifiedName = referenceExpr.asQualifiedName();
        if (qualifiedName == null) {
          return null;
        }
        final String relativePath = qualifiedName.join("/");
        sourceFile = relativeImportBaseDir.findFileByRelativePath(relativePath);
        if (sourceFile == null) {
          sourceFile = relativeImportBaseDir.findFileByRelativePath(relativePath + PyNames.DOT_PY);
        }
      }
      if (sourceFile != null) {
        final PsiFileSystemItem sourceElement;
        if (sourceFile.isDirectory()) {
          sourceElement = context.getManager().findDirectory(sourceFile);
        }
        else {
          sourceElement = context.getManager().findFile(sourceFile);
        }
        return sourceElement;
      }
    }
    return null;
  }
private static @Nullable PsiFileSystemItem resolveRelativeImportFromModuleLocation(@NotNull PyFile context,
                                                                           @NotNull String moduleLocation,
                                                                           @Nullable PyReferenceExpression referenceExpr,
                                                                           int relativeLevel)