public function __construct( $theme_json = array(), $origin = 'theme' ) {
		if ( ! in_array( $origin, self::VALID_ORIGINS, true ) ) {
			$origin = 'theme';
		}

		$this->theme_json    = WP_Theme_JSON_Schema::migrate( $theme_json );
		$valid_block_names   = array_keys( self::get_blocks_metadata() );
		$valid_element_names = array_keys( self::ELEMENTS );
		$theme_json          = self::sanitize( $this->theme_json, $valid_block_names, $valid_element_names );
		$this->theme_json    = self::maybe_opt_in_into_settings( $theme_json );

		// Internally, presets are keyed by origin.
		$nodes = self::get_setting_nodes( $this->theme_json );
		foreach ( $nodes as $node ) {
			foreach ( self::PRESETS_METADATA as $preset_metadata ) {
				$path   = array_merge( $node['path'], $preset_metadata['path'] );
				$preset = _wp_array_get( $this->theme_json, $path, null );
				if ( null !== $preset ) {
					// If the preset is not already keyed by origin.
					if ( isset( $preset[0] ) || empty( $preset ) ) {
						_wp_array_set( $this->theme_json, $path, array( $origin => $preset ) );
					}
				}
			}
		}
	}