code: private boolean isPid(String value) {
          if ( (value == null)
                  || (value.indexOf("+") != -1)
                  || (value.indexOf("/") != -1)
                  || (value.indexOf(" ") != -1) ) {
              return false;
          }
          int i = value.indexOf(":");
          return i > 0 && i < (value.length() - 1) && value.lastIndexOf(":") == i;
      }
docs: TODO: Make PID syntax checks more robust