public String getStreamId() {
        return this.streamId;
    }
This value is required if the upstream system uses this identifier because without it, the SRT handshake between
MediaLive (the caller) and the upstream system (the listener) might fail.

@return This value is required if the upstream system uses this identifier because without it, the SRT handshake
        between MediaLive (the caller) and the upstream system (the listener) might fail.
aws-java-sdk-medialive/src/main/java/com/amazonaws/services/medialive/model/SrtCallerSourceRequest.java