val <T : CharSequence> CharSequenceContainsNotCheckerBuilder<T, CharSequenceContainsNotSearchBehaviour>.ignoriereGrossKleinschreibung: CharSequenceContainsNotCheckerBuilder<T, CharSequenceContainsIgnoringCaseSearchBehaviour>
Defines that the decoration behaviour ignore case shall be applied to this sophisticated contains not assertion.
Return
The newly created builder.