Method shift

deps/undici/undici.js:847–855

@returns {T|null}

()

      }
      /** @returns {T|null} */
      shift() {
        const nextItem = this.list[this.bottom];
        if (nextItem === void 0) {
          return null;
        }
        this.list[this.bottom] = void 0;
        this.bottom = this.bottom + 1 & kMask;
        return nextItem;
      }
    };
    module2.exports = class FixedQueue {
      static {