mixin template can't contain statements: workaround?

[Timothee Cour via Digitalmars-d-learn]

Why can't we allow mixin templates to contain statements, as is the case
for regular mixins?
Is there a workaround?

here's a dummy example:

template mixin Foo{
 //some statement, eg: 'return;'
}

void fun(){
  mixin Foo;
}

Note that I can do this with a regular mixin, but template mixins are
cleaner (esp in more complex examples).
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