code: 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;
      }
docs: <p>
  Information about the key pairs.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setKeyPairs(java.util.Collection)} or {@link #withKeyPairs(java.util.Collection)} if you want to override
  the existing values.
  </p>
  
  @param keyPairs
  Information about the key pairs.
  @return Returns a reference to this object so that method calls can be chained together.