code: public static boolean isIndependentProxy(
              GSIConstants.CertificateType certType) {
          return certType == GSIConstants.CertificateType.GSI_3_INDEPENDENT_PROXY
                  || certType == GSIConstants.CertificateType.GSI_4_INDEPENDENT_PROXY;
      }
docs: Determines if a specified certificate type indicates a GSI-3 or GS-4
  limited proxy certificate.
  
  @param certType the certificate type to check.
  @return true if certType is a GSI-3 or GSI-4 independent proxy, false
  otherwise.