cancelable property
      
      bool
      get
      cancelable
      
    
    
Returns true or false depending on how event was initialized. Its return value does not always carry meaning, but true can indicate that part of the operation during which event was dispatched, can be canceled by invoking the preventDefault() method.
Implementation
_i2.bool get cancelable => _i4.getProperty(
      this,
      'cancelable',
    );