contains method Null safety

  1. @override
bool contains(
  1. covariant String singleCharacterString
)
override

Whether singleCharacterString occurs in this sequence of characters.

Returns true only if singleCharacterString is a string containing a single character and that character is one of the characters in this character sequence, and false otherwise. This behavior is inherited from Iterable<String>, which is why it is not Character based. Use containsAll for a method which acts like String.contains for characters.

Implementation

@override
bool contains(covariant String singleCharacterString);