infix fun <T : CharSequence> CharSequenceContainsNotCheckerBuilder<T, CharSequenceContainsNotSearchBehaviour>.ignoring(case: case): CharSequenceContainsNotCheckerBuilder<T, CharSequenceContainsIgnoringCaseSearchBehaviour>
Defines that the decoration behaviour ignore case shall be applied to this sophisticated contains not assertion.
case - Has to be case.
Return
The newly created builder.