code: public void setKeyTypes(java.util.Collection<String> keyTypes) {
          if (keyTypes == null) {
              this.keyTypes = null;
              return;
          }
  
          this.keyTypes = new java.util.ArrayList<String>(keyTypes);
      }
docs: <p>
  Specify one or more algorithms that can be used to generate key pairs.
  </p>
  
  @param keyTypes
  Specify one or more algorithms that can be used to generate key pairs.
  @see KeyAlgorithm