this.fMember = member; this.fCalledMember = calledMember; this.fStart = start; this.fEnd = end;  fCallText = initializeCallText();
this(member, calledMember, start, end, UNKNOWN_LINE_NUMBER);
    public CallLocation(IMember member, IMember calledMember, int start, int end) {        this.fMember = member;        this.fCalledMember = calledMember;        this.fStart = start;        this.fEnd = end;        fCallText = initializeCallText();    }