code: private function getParameterClosure($parameter)
      {
          $parameterClosure = null;
  
          foreach (array_keys($this->parameterCluster->prefixes) as $prefix) {
              if (substr($parameter, 0, strlen($prefix)) == $prefix) {
                  @$parameterClosure = $this->parameterCluster->prefixes[$prefix][
                      substr(
                          $parameter,
                          strlen($prefix),
                          strlen($parameter) - strlen($prefix)
                      )
                  ];
              }
          }
  
          return $parameterClosure;
      }
docs: Get the ParameterClosure object associated with a parameter.
  If no ParameterClosure is found for the parameter, return null.
  
  @param  string $parameter
  
  @return ParameterClosure