code: public Member addMember(Member member) {
  		if (haveMember(member.getName())) {
  			throw new FuzzerException(member.getName() + ": member already exists of variable '" + name + "'");
  		}
  		members.add(member);
  		return member;
  	}
docs: Add a fuzzy member to this variable.
  <p>
  @param member the member
  @return the member