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 // simple arity
 
 .hello(@a) {
         hello: one;
 }
 
 .hello(@a, @b) {
         hello: two;
 }
 
 .hello(@a, @b, @c) {
         hello: three;
 }
 
 
 .world(@a, @b, @c) {
         world: three;
 }
 
 .world(@a, @b) {
         world: two;
 }
 
 .world(@a) {
         world: one;
 }
 
 .one {
         .hello(1);
         .world(1);
 }
 
 .two {
         .hello(1, 1);
         .world(1, 1);
 }
 
 .three {
         .hello(1, 1, 1);
         .world(1, 1, 1);
 }
 
 
 // arity with default values
 
 .foo(@a, @b: cool) {
         foo: two @b;
 }
 
 .foo(@a, @b: cool, @c: yeah) {
         foo: three @b @c;
 }
 
 
 .baz(@a, @b, @c: yeah) {
         baz: three @c;
 }
 
 .baz(@a, @b: cool) {
         baz: two @b;
 }
 
 
 .multi-foo {
         .foo(1);
         .foo(1, 1);
         .foo(1,1,1);
 }
 
 .multi-baz {
         .baz(1);
         .baz(1, 1);
         .baz(1,1,1);
 }