_Invalidate
void _Invalidate() { fParent = NULL; }
_Invalidate(firstCleared, lastCleared);
_Invalidate(bottom - numLines + 1, bottom);
_Invalidate(bottom + 1 - numLines, bottom);
_Invalidate(bottom + 1, fHeight - 1);
_Invalidate(top, bottom);
_Invalidate(top, bottom);
_Invalidate(0, fHeight - 1);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(0, fHeight - 1);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(0, 0);
_Invalidate(fCursor.y, fCursor.y);
_Invalidate(fCursor.y, fCursor.y);
inline void _Invalidate(int32 top, int32 bottom);
_Invalidate();
_Invalidate();
_Invalidate();
_Invalidate();
void _Invalidate() const;