description

# SplayTreeMap<K, V> constructor Null safety

SplayTreeMap<K, V>(

1. [int compare(
   1. K key1,
   2. K key2
   ),
2. bool isValidKey(
   1. dynamic potentialKey
   )]

)

## Implementation

    SplayTreeMap(
        [int Function(K key1, K key2)? compare,
        bool Function(dynamic potentialKey)? isValidKey])
        : _compare = compare ?? _defaultCompare<K>(),
          _validKey = isValidKey ?? ((dynamic v) => v is K);