code: protected void stripOutReservedProperties() {
          for (ReservedProperties reservedProperty : ReservedProperties.values()) {
              if (properties.containsKey(reservedProperty.getPropertyKey())) {
                  properties.remove(reservedProperty.getPropertyKey());
                  LOGGER.warn("Unable to set '" + reservedProperty.getPropertyKey() + "', it is a reserved property in the jmeter-maven-plugin");
              }
          }
      }
docs: This will strip all reserved properties from a Properties object.
  (Used to ensure that restricted properties haven't been set in custom properties files)