the function cant be assign to parameter flutter code example

Example: the function cant be assign to parameter flutter

If the right-hand side should be assigned to something else, such as a local variable, then change the left-hand side:

void f() {}

void g() {
  var x = () {};
  print(x);
}
If the intent is to change the implementation of the function, then define a function-valued variable instead of a function:

void Function() f = () {};

void g() {
  f = () {};
}

//please go through

https://dart.dev/tools/diagnostic-messages#assignment_to_function