How to change directives in SASS/SCSS?

Question

Sass

Good day, Dear Jedi. A young padawan would like to know how to change directives in SASS ? In some SASS (SCSS) video tutorials, people declare and call mixins more conveniently than in the standard. The "+" sign is used instead of @mixin , and the "=" sign is used instead of the call (or vice versa, but that's not the point).
The essence of the question - how to do it?)
When you write 2-3 dozen mixins and call each of them repeatedly - I would like to speed up the process using a simplified version of the declaration / call.
Thanks in advance for your answers.

Answer 1

it's called sass-syntax and it's deprecated.
sass-lang.com/documentation/file.INDENTED_SYNTAX.html