/**
     * Gets the children of this result.
     *
     * @return the children of this result, can be empty but never {@code null}
     */
    @Nonnull
    List<? extends ModelBuilderResult> getChildren();

    /**
     * Creates a human-readable representation of these errors.
     */
    @Override
    String toString();

        }

        @Override
        public ProblemCollector<ModelProblem> getProblemCollector() {
            return null;
        }

        @Override
        public List<? extends ModelBuilderResult> getChildren() {
            return List.of();
        }
    }

                }
            }
            return results;
        }

        private Stream<ModelBuilderResult> results(ModelBuilderResult result) {
            return Stream.concat(result.getChildren().stream().flatMap(this::results), Stream.of(result));
        }

        private List<org.apache.maven.model.building.ModelProblem> convert(
                ProblemCollector<ModelProblem> problemCollector) {

    @Nullable
    default String getAttribute(@Nonnull String name) {
        return attribute(name);
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nonnull
    default List<XmlNode> getChildren() {
        return children();
    }

    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nullable
    default XmlNode getChild(String name) {
        return child(name);
    }