docs: @Nullable
    public static ExpressionTree getArgument(AnnotationTree annotationTree, String name) {
      for (ExpressionTree argumentTree : annotationTree.getArguments()) {
        if (argumentTree.getKind() != Tree.Kind.ASSIGNMENT) {
          continue;
        }
        AssignmentTree assignmentTree = (AssignmentTree) argumentTree;
        if (!assignmentTree.getVariable().toString().equals(name)) {
          continue;
        }
        ExpressionTree expressionTree = assignmentTree.getExpression();
        return expressionTree;
      }
      return null;
    }