public final Map<String, String> getParameters() {
    return unmodifiableParameters;
  }
Return all parameters of the listener event. Parameters are read-only (unmodifiable map). If a new parameter
must be added, please use the putParameter() method.


@return A map object with all parameters.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/events/ListenerEvent.java