code: @Override
      protected void parse() {
          maximumInstances = getInt(PARAM_MAXIMUM_INSTANCES, DEFAULT_MAXIMUM_INSTANCES);
          mergeRelatedIssues = getBoolean(PARAM_MERGE_RELATED_ISSUES, true);
          overridesFilename = getString(PARAM_OVERRIDES_FILENAME, "");
      }
docs: Parses the alert options.
  
  @see #getMaximumInstances()