'Error: The argument type 'Null Function(DateTime, List<dynamic>)' can't be assigned to the parameter

I am facing the same issue with this

     Error: 
        The argument type 'Null Function(DateTime, List<dynamic>)' can't be assigned 
        to the parameter type 'void Function(DateTime, List<dynamic>, List<dynamic>)'.
        - 'DateTime' is from 'dart:core'. - 'List' is from 'dart:core'. 
        onDaySelected: (day, events) {

flutter dart

Solution 1:^[1]

That is one way how to avoid the error

onDaySelected: (date, event, _) {
    print(date.toIso8601String());
},

Solution 2:^[2]

yeah I was also having the same issue it just got solved by putting ' _ ' in the third argument

onDaySelected: (date, events, _) {
        _onDaySelected(date, events);
        _animationController.forward(from: 0.0);
      },

Solution 3:^[3]

I managed to solve it by passing _ as the third argument.

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	blckCoach
Solution 2	Spsnamta
Solution 3	General Grievance

'Error: The argument type 'Null Function(DateTime, List<dynamic>)' can't be assigned to the parameter

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]