code: @Nonnull
      public BugInstance addReferencedField(DismantleBytecode visitor) {
          FieldAnnotation f = FieldAnnotation.fromReferencedField(visitor);
          addField(f);
          return this;
      }
docs: Add a field annotation for the field which has just been accessed by the
  method currently being visited by given visitor. Assumes that a
  getfield/putfield or getstatic/putstatic has just been seen.
  
  @param visitor
  the DismantleBytecode object
  @return this object