question: @ Override public int hashCode ( ) { int hash = 7 ; hash = 71 * hash + super . hashCode ( ) ; hash = 71 * hash + ( _type != null ? _type . hashCode ( ) : 0 ) ; hash = 71 * hash + ( _timestamp != null ? _timestamp . hashCode ( ) : 0 ) ; hash = 71 * hash + ( _source != null ? _source . hashCode ( ) : 0 ) ; hash = 71 * hash + ( _id != null ? _id . hashCode ( ) : 0 ) ; return hash ; }
target:  Returns the hash code for the annotation, based on the scope, metric, tags, type, source, ID and timestamp.