code: public void setKeyNames(java.util.Collection<String> keyNames) {
          if (keyNames == null) {
              this.keyNames = null;
              return;
          }
  
          this.keyNames = new com.amazonaws.internal.SdkInternalList<String>(keyNames);
      }
docs: <p>
  The key pair names.
  </p>
  <p>
  Default: Describes all your key pairs.
  </p>
  
  @param keyNames
  The key pair names.</p>
  <p>
  Default: Describes all your key pairs.