containsKey method

ValueCell<bool> containsKey(
  1. ValueCell key
)

Returns a cell which evaluates to true if the Map held in this cell contains the key key.

Implementation

ValueCell<bool> containsKey(ValueCell key) => (this, key).apply((map, k) => map.containsKey(k),
    key: _MapMethodKey(this, #containsKey, key),
).store(changesOnly: true);