public String getStreamName() {
    return this.streamName;
  }
Getter for the StreamName parameter. See also {@link #createAppender(String, Filter, Layout, boolean, boolean, String)} for when this is called.
Example: {@literal <param name="StreamName" value="ExampleStreamName"/>}
@return The configured stream name.
samza-log4j2/src/main/java/org/apache/samza/logging/log4j2/StreamAppender.java