use_function_type_syntax_for_parameters

Use the generic function type syntax to declare the parameter '{0}'.

The analyzer produces this diagnostic when the older style function-valued parameter syntax is used.

The following code produces this diagnostic because the function-valued parameter f is declared using an older style syntax:

void g(bool f(String s)) {}

Use the generic function type syntax to declare the parameter:

void g(bool Function(String) f) {}