Assertion failed
assert(text == null || text.length == 1 || text.toLowerCase() == text)
       |    |          |    |      |       |    |             |  |
       |    |          |    |      |       |    |             |  Hello
       |    |          |    |      |       |    |             false
       |    |          |    |      |       |    hello
       |    |          |    |      |       Hello
       |    |          |    |      false
       |    |          |    5
       |    |          Hello
       |    false
       Hello