Purpose of required before named non-nullable arguments

[MohammedAsaadAsaad]

I'm wondering what is the purpose of 'required' key word used with named non-nullable arguments?!
After null-safety, do really we need to put 'required' before the non-nullable named argument?
Implicitly, the compiler consider it as required and forces the developer to use it, so. why we need to write it?
Thanks.

[mateusfccp]

Duplicate: #1502, #878.

[lrhn]

Yep, as discussed before, the required is still required in function types, because it's possible to have an optional non-nullable parameter with a default value, and function types don't include the default value.
In actual functions, it's technically only needed if you have a nullable required parameter, because the presence of a default value would mean optional, and its absence would then imply required for non-nullable types.

But for consistency and simplicity, required is required on every required named parameter, everywhere.