private Set<String> collectAllKeysFromFile(JsonFile file) {
    Set<String> propertyNames = new HashSet<>();
    file.accept(new JsonRecursiveElementVisitor() {
      @Override
      public void visitProperty(@NotNull JsonProperty o) {
        super.visitProperty(o);

        propertyNames.add(o.getName());
      }
    });

    return propertyNames;
  }
private Set<String> collectAllKeysFromFile(JsonFile file)