// No arguments with parenthesis
=foo()
  color: red


.foo
  +foo()




// No arguments with no parenthesis
=bar
  color: orange


.bar
  +bar




// Arguments with parenthesis
=baz($color)
  color: $color


$foo: blue

.baz
  +baz($foo)




// Parenthesis only where required
=qux($color: lime)
  color: $color


.qux
  +qux