splitAt method
Implementation
EasyText? splitAt(int index) {
assert(
index >= 0 && index <= length,
'offset $index does '
'not satisfy the range '
'of this text => 0 to $length');
if (index == 0) return this;
if (index == length) return isLast ? null : next;
final EasyText split = EasyText(
text: after(index),
styles: styles.copy(),
);
text = before(index);
insertAfter(split);
return split;
}