message: make findClass method public. Required for surveyjs.editor project:
diff: @@ -227,7 +227,7 @@ export class JsonMetadata {
  this.fillChildrenClasses(children[i].name, canBeCreated, result);
  }
  }
  - private findClass(name: string): JsonMetadataClass {
  + public findClass(name: string): JsonMetadataClass {
  return this.classes[name];
  }
  private fillProperties(name: string, list: Array<JsonObjectProperty>) {
  