Method push

deps/undici/undici.js:869–874

@param {T} data

(data)

      }
      /** @param {T} data */
      push(data) {
        if (this.head.isFull()) {
          this.head = this.head.next = new FixedCircularBuffer();
        }
        this.head.push(data);
      }
      /** @returns {T|null} */
      shift() {
        const tail = this.tail;