isBlank()

<aside> 💡 length == 0 || indices.all { *this*[it].isWhitespace() }

</aside>

isWhiteSpace

<aside> 💡 Character.isWhitespace(*this*) || Character.isSpaceChar(*this*)

</aside>

isNotBlank()

<aside> 💡 !isBlank()

</aside>

isEmpty()

<aside> 💡 length == 0

</aside>

isNotEmpty()