return getProperties().elements();
    }

    @Override
    public Set<java.util.Map.Entry<Object, Object>> entrySet() {
        return getProperties().entrySet();
    }

    @Override
    public boolean equals(final Object o) {
        return getProperties().equals(o);
    }

    @Override
    public Object get(final Object key) {
        return getProperties().get(key);
    }

        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated-1", result.getEffectiveModel().getProperties().get("profile.file"));
        assertNull(result.getEffectiveModel().getProperties().get("profile.miss"));
    }

    }

    @Override
    public Artifact setProperties(Map<String, String> properties) {
        Map<String, String> current = getProperties();
        if (current.equals(properties) || (properties == null && current.isEmpty())) {
            return this;
        }
        return new RelocatedArtifact(
                artifact.setProperties(properties), groupId, artifactId, classifier, extension, version, message);

        public String getClassifier() {
            return type.getClassifier() == null ? "" : type.getClassifier();
        }

        @Override
        public Map<String, String> getProperties() {
            return type.getProperties();
        }
    }

                        Map<String, String> props = new HashMap<>(artifact.getProperties());
                        ArtifactType derived = derive(parentType, currentType);
                        props.putAll(derived.getProperties());
                        node.setArtifact(artifact.setProperties(props));
                    }
                }
            }
            stack.push(currentType);

        Properties properties = getMavenProject(project).getProperties();
        if (value == null) {
            properties.remove(key);
        } else {
            properties.setProperty(key, value);
        }
    }

    @Override
    @Nonnull
    public Map<String, String> getProperties(@Nonnull Project project) {
        return Collections.unmodifiableMap(

     *
     * @param annotation the annotation (must not be {@literal null})
     * @return a {@link Map} of annotation element names and values
     */
    public static Map<String, Object> getProperties(final Annotation annotation) {
        assertArgumentNotNull("annotation", annotation);

        final Map<String, Object> map = newHashMap();

        ModelBuildingResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated", result.getEffectiveModel().getProperties().get("profile.file"));
        Xpp3Dom conf = (Xpp3Dom)
                result.getEffectiveModel().getBuild().getPlugins().get(0).getConfiguration();
        assertNotNull(conf);

     * environment like {@link System#getProperties()} and environment variables.
     *
     * @return The system properties, never {@code null}.
     */
    Properties getSystemProperties();

    /**
     * Sets the system properties to use for interpolation. The system properties are collected from the runtime
     * environment like {@link System#getProperties()} and environment variables.
     *

        return systemProperties;
    }

    /**
     * Sets the system properties to use for interpolation and profile activation. The system properties are collected
     * from the runtime environment like {@link System#getProperties()} and environment variables.
     *
     * @param systemProperties The system properties, may be {@code null}.
     * @return This context, never {@code null}.
     */
    @SuppressWarnings("unchecked")