private @Nullable VirtualFile resolveFromSchemaProperty(@Nullable String schemaUrl, @NotNull VirtualFile file) {
    if (schemaUrl != null) {
      VirtualFile virtualFile = findSchemaFileByReference(schemaUrl, file);
      if (virtualFile != null) return virtualFile;
    }
    return null;
  }
private @Nullable VirtualFile resolveFromSchemaProperty(@Nullable String schemaUrl, @NotNull VirtualFile file)