public IBlock GetCaretBrotherElement(bool before, Point caretPoint)
{
if (null != Molecule)
{
var block = Molecule.GetCaretBrotherElement(before, caretPoint);
if (null != block)
{
return(block);
}
}
if (null != Denominator)
{
var block = Denominator.GetCaretBrotherElement(before, caretPoint);
if (null != block)
{
return(block);
}
}
return(null);
}