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None of the following functions can be called with the arguments supplied.
<ul>
  <li>CharSequence.contains(<font color=red><b>Char</b></font>, <font color=red><b>Boolean = ...</b></font>) <i>defined in</i> kotlin.text</li>
  <li>CharSequence.contains(<font color=red><b>CharSequence</b></font>, <font color=red><b>Boolean = ...</b></font>) <i>defined in</i> kotlin.text</li>
  <li>CharSequence.contains(<font color=red><b>Regex</b></font>) <i>defined in</i> kotlin.text</li>
</ul>
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