docs: public DescribeKeyPairsResult withKeyPairs(KeyPairInfo... keyPairs) {
          if (this.keyPairs == null) {
              setKeyPairs(new com.amazonaws.internal.SdkInternalList<KeyPairInfo>(keyPairs.length));
          }
          for (KeyPairInfo ele : keyPairs) {
              this.keyPairs.add(ele);
          }
          return this;
      }