this.repositorySystemSession = requireNonNull(repositorySystemSession);
        Properties executionProperties = new Properties();
        executionProperties.putAll(request.getSystemProperties());
        executionProperties.putAll(request.getUserProperties());
        this.executionProperties = executionProperties;
    }

    @Deprecated
    public MavenSession(
            PlexusContainer container,

        // Maven4: We may want to evaluate how this is used but we add these separate as the
        // getExecutionProperties is deprecated in MavenSession.
        //
        this.properties.putAll(session.getUserProperties());
        this.properties.putAll(session.getSystemProperties());

        String basedir = null;

        if (project != null) {
            File projectFile = project.getBasedir();

            HashMap<String, String> result = new HashMap<>(getSystemProperties());
            if (project != null) {
                result.putAll(project.getModel().getProperties());
            }
            result.putAll(getUserProperties());
            return result;
        }

        @Override
        public Version getMavenVersion() {
            return null;
        }

     */
    @Deprecated
    public Model interpolate(Model model, Map<String, ?> context, boolean strict) throws ModelInterpolationException {
        Properties props = new Properties();
        props.putAll(context);

        return interpolate(model, null, new DefaultProjectBuilderConfiguration().setExecutionProperties(props), true);
    }

        Map<String, String> mergedProps = new HashMap<>();
        mergedProps.putAll(getPropertiesFromRequestedProfiles(request));
        mergedProps.putAll(new HashMap<String, String>((Map) request.getSystemProperties()));
        mergedProps.putAll(new HashMap<String, String>((Map) request.getUserProperties()));
        return mergedProps;
    }

            if (sourceDominant) {
                merged.putAll(target.getProperties());
                putAll(merged, source.getProperties(), CHILD_DIRECTORY_PROPERTY);
            } else {
                putAll(merged, source.getProperties(), CHILD_DIRECTORY_PROPERTY);
                merged.putAll(target.getProperties());
            }
            builder.properties(merged);

r container; private org.codehaus.plexus.logging.Logger logger; protected void AbstractActiveMap(); protected void AbstractActiveMap(org.codehaus.plexus.PlexusContainer, String); public void clear(); public Object put(Object, Object); public void putAll(java.util.Map); public Object remove(Object); protected final org.codehaus.plexus.logging.Logger getLogger(); protected final java.util.Map getMap(); protected final java.util.Map checkedGetMap() throws org.codehaus.plexus.component.repository.ex...

r container; private org.codehaus.plexus.logging.Logger logger; protected void AbstractActiveMap(); protected void AbstractActiveMap(org.codehaus.plexus.PlexusContainer, String); public void clear(); public Object put(Object, Object); public void putAll(java.util.Map); public Object remove(Object); protected final org.codehaus.plexus.logging.Logger getLogger(); protected final java.util.Map getMap(); protected final java.util.Map checkedGetMap() throws org.codehaus.plexus.component.repository.ex...

        Map<String, String> props = new HashMap<>();
        if (recessive != null) {
            props.putAll(recessive);
        }
        if (dominant != null) {
            props.putAll(dominant);
        }
        return props;
    }

    private Artifact getRelocation(

    @Override
    public MavenExecutionRequest setUserProperties(Properties userProperties) {
        if (userProperties != null) {
            this.userProperties = new Properties();
            this.userProperties.putAll(userProperties);
        } else {
            this.userProperties = null;
        }

        return this;
    }

    @Override