@Override
    public int hashCode() {
        int result = attribute != null ? attribute.hashCode() : 0;
        result = 31 * result + (position != null ? Arrays.hashCode(position) : 0);
        return result;
    }
Holds the Attribute info for StateEvent data to StreamEvent data
modules/siddhi-core/src/main/java/io/siddhi/core/event/state/MetaStateEventAttribute.java