493     if (!debug.cancellation()) return this._warn("cancellation is disabled");
1010     if ("cancellation" in opts && opts.cancellation && !config.cancellation) {
1024         config.cancellation = true;
1631     cancellation: false,  property in module.exports.config
1644     cancellation: function() {
1645         return config.cancellation;
2141     if (debug.cancellation()) {
2171     if (debug.cancellation() && this._finallyPromise !== null) {
4754         if (debug.cancellation() && value instanceof Promise) {
4760         if (debug.cancellation()) {
4813     if (debug.cancellation()) {