docs: public GetKeyPairsResult withKeyPairs(KeyPair... keyPairs) {
          if (this.keyPairs == null) {
              setKeyPairs(new java.util.ArrayList<KeyPair>(keyPairs.length));
          }
          for (KeyPair ele : keyPairs) {
              this.keyPairs.add(ele);
          }
          return this;
      }