What is the reason for declaring the mutableLiveData class with a val data type?

edit

The reason for declaring the MutableLiveData class with a val data type is to ensure that the reference to the instance of the class cannot be changed after it has been created. MutableLiveData is designed to allow the data within it to be changed, but the instance itself should not be replaced with another instance. By declaring it as a val, this aspect of immutability is guaranteed, preventing accidental errors and bugs in the code.