public function _publish_changeset_values( $changeset_post_id ) {
		global $wpdb;

		$publishing_changeset_data = $this->get_changeset_post_data( $changeset_post_id );
		if ( is_wp_error( $publishing_changeset_data ) ) {
			return $publishing_changeset_data;
		}

		$changeset_post = get_post( $changeset_post_id );

		/*
		 * Temporarily override the changeset context so that it will be read
		 * in calls to unsanitized_post_values() and so that it will be available
		 * on the $wp_customize object passed to hooks during the save logic.
		 */
		$previous_changeset_post_id = $this->_changeset_post_id;
		$this->_changeset_post_id   = $changeset_post_id;
		$previous_changeset_uuid    = $this->_changeset_uuid;
		$this->_changeset_uuid      = $changeset_post->post_name;
		$previous_changeset_data    = $this->_changeset_data;
		$this->_changeset_data      = $publishing_changeset_data;

		// Parse changeset data to identify theme mod settings and user IDs associated with settings to be saved.
		$setting_user_ids   = array();
		$theme_mod_settings = array();
		$namespace_pattern  = '/^(?P<stylesheet>.+?)::(?P<setting_id>.+)$/';
		$matches            = array();
		foreach ( $this->_changeset_data as $raw_setting_id => $setting_params ) {
			$actual_setting_id    = null;
			$is_theme_mod_setting = (
				isset( $setting_params['value'] )
				&&
				isset( $setting_params['type'] )
				&&
				'theme_mod' === $setting_params['type']
				&&
				preg_match( $namespace_pattern, $raw_setting_id, $matches )
			);
			if ( $is_theme_mod_setting ) {
				if ( ! isset( $theme_mod_settings[ $matches['stylesheet'] ] ) ) {
					$theme_mod_settings[ $matches['stylesheet'] ] = array();
				}
				$theme_mod_settings[ $matches['stylesheet'] ][ $matches['setting_id'] ] = $setting_params;

				if ( $this->get_stylesheet() === $matches['stylesheet'] ) {
					$actual_setting_id = $matches['setting_id'];
				}
			} else {
				$actual_setting_id = $raw_setting_id;
			}

			// Keep track of the user IDs for settings actually for this theme.
			if ( $actual_setting_id && isset( $setting_params['user_id'] ) ) {
				$setting_user_ids[ $actual_setting_id ] = $setting_params['user_id'];
			}
		}

		$changeset_setting_values = $this->unsanitized_post_values(
			array(
				'exclude_post_data' => true,
				'exclude_changeset' => false,
			)
		);
		$changeset_setting_ids    = array_keys( $changeset_setting_values );
		$this->add_dynamic_settings( $changeset_setting_ids );

		/**
		 * Fires once the theme has switched in the Customizer, but before settings
		 * have been saved.
		 *
		 * @since 3.4.0
		 *
		 * @param WP_Customize_Manager $manager WP_Customize_Manager instance.
		 */
		do_action( 'customize_save', $this );

		/*
		 * Ensure that all settings will allow themselves to be saved. Note that
		 * this is safe because the setting would have checked the capability
		 * when the setting value was written into the changeset. So this is why
		 * an additional capability check is not required here.
		 */
		$original_setting_capabilities = array();
		foreach ( $changeset_setting_ids as $setting_id ) {
			$setting = $this->get_setting( $setting_id );
			if ( $setting && ! isset( $setting_user_ids[ $setting_id ] ) ) {
				$original_setting_capabilities[ $setting->id ] = $setting->capability;
				$setting->capability                           = 'exist';
			}
		}

		$original_user_id = get_current_user_id();
		foreach ( $changeset_setting_ids as $setting_id ) {
			$setting = $this->get_setting( $setting_id );
			if ( $setting ) {
				/*
				 * Set the current user to match the user who saved the value into
				 * the changeset so that any filters that apply during the save
				 * process will respect the original user's capabilities. This
				 * will ensure, for example, that KSES won't strip unsafe HTML
				 * when a scheduled changeset publishes via WP Cron.
				 */
				if ( isset( $setting_user_ids[ $setting_id ] ) ) {
					wp_set_current_user( $setting_user_ids[ $setting_id ] );
				} else {
					wp_set_current_user( $original_user_id );
				}

				$setting->save();
			}
		}
		wp_set_current_user( $original_user_id );

		// Update the stashed theme mod settings, removing the active theme's stashed settings, if activated.
		if ( did_action( 'switch_theme' ) ) {
			$other_theme_mod_settings = $theme_mod_settings;
			unset( $other_theme_mod_settings[ $this->get_stylesheet() ] );
			$this->update_stashed_theme_mod_settings( $other_theme_mod_settings );
		}

		/**
		 * Fires after Customize settings have been saved.
		 *
		 * @since 3.6.0
		 *
		 * @param WP_Customize_Manager $manager WP_Customize_Manager instance.
		 */
		do_action( 'customize_save_after', $this );

		// Restore original capabilities.
		foreach ( $original_setting_capabilities as $setting_id => $capability ) {
			$setting = $this->get_setting( $setting_id );
			if ( $setting ) {
				$setting->capability = $capability;
			}
		}

		// Restore original changeset data.
		$this->_changeset_data    = $previous_changeset_data;
		$this->_changeset_post_id = $previous_changeset_post_id;
		$this->_changeset_uuid    = $previous_changeset_uuid;

		/*
		 * Convert all autosave revisions into their own auto-drafts so that users can be prompted to
		 * restore them when a changeset is published, but they had been locked out from including
		 * their changes in the changeset.
		 */
		$revisions = wp_get_post_revisions( $changeset_post_id, array( 'check_enabled' => false ) );
		foreach ( $revisions as $revision ) {
			if ( false !== strpos( $revision->post_name, "{$changeset_post_id}-autosave" ) ) {
				$wpdb->update(
					$wpdb->posts,
					array(
						'post_status' => 'auto-draft',
						'post_type'   => 'customize_changeset',
						'post_name'   => wp_generate_uuid4(),
						'post_parent' => 0,
					),
					array(
						'ID' => $revision->ID,
					)
				);
				clean_post_cache( $revision->ID );
			}
		}

		return true;
	}