putIfAbsent abstract method

Future<bool> putIfAbsent(
  1. String key,
  2. dynamic value, {
  3. Duration? expiryDuration,
})

Associates the specified key with the given value if not already associated with a value.

  • key: key with which the specified value is to be associated
  • value: value to be associated with the specified key

Returns true if a value was set.

Implementation

Future<bool> putIfAbsent(String key, dynamic value,
    {Duration? expiryDuration});