WP_REST_Global_Styles_Revisions_Controller::get_revision( int $id ): WP_Post|WP_Error

Source

$parent               = $this->get_parent( $request['parent'] );
$global_styles_config = $this->get_decoded_global_styles_json( $post->post_content );

if ( is_wp_error( $global_styles_config ) ) {
	return $global_styles_config;
}

$fields     = $this->get_fields_for_response( $request );
$data       = array();
$theme_json = null;

if ( ! empty( $global_styles_config['styles'] ) || ! empty( $global_styles_config['settings'] ) ) {
	$theme_json           = new WP_Theme_JSON( $global_styles_config, 'custom' );
	$global_styles_config = $theme_json->get_raw_data();
	if ( rest_is_field_included( 'settings', $fields ) ) {
		$data['settings'] = ! empty( $global_styles_config['settings'] ) ? $global_styles_config['settings'] : new stdClass();
	}

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