src/main/java/org/intellimate/izou/sdk/frameworks/music/player/Progress.java
public HashMap<String, Long> export() {
        HashMap<String, Long> data = new HashMap<>();
        data.put(lengthDescriptor, length);
        data.put(knownPositionDescriptor, knownPosition);
        data.put(knownMillisTimeStampDescriptor, knownMillisTimeStamp);
        return data;
    }
public HashMap<String, Long> export() {
        HashMap<String, Long> data = new HashMap<>();
        data.put(lengthDescriptor, length);
        data.put(knownPositionDescriptor, knownPosition);
        data.put(knownMillisTimeStampDescriptor, knownMillisTimeStamp);
        return data;
    }
exports the progress
@return a new HashMap