message: Step into node.args for label definitions
diff: @@ -125,6 +125,9 @@ export class Reference {
  if (latexParser.hasContentArray(node)) {
  return this.getRefFromNodeArray(node.content, lines)
  }
  + if (latexParser.hasArgsArray(node)) {
  + return this.getRefFromNodeArray(node.args, lines)
  + }
  return refs
  }
  