code: public static SourceLineAnnotation fromVisitedMethod(PreorderVisitor visitor) {
  
          SourceLineAnnotation sourceLines = getSourceAnnotationForMethod(visitor.getDottedClassName(), visitor.getMethodName(),
                  visitor.getMethodSig());
          return sourceLines;
      }
docs: Factory method for creating a source line annotation describing an entire
  method.
  
  @param visitor
  a BetterVisitor which is visiting the method
  @return the SourceLineAnnotation