@font-feature-values  {  }

@font-feature-values 6788 {  }

@font-feature-values ident

@font-feature-values ;

@font-feature-values ident {
	{ }
}

@font-feature-values ident {
	@xxx { }
}

@font-feature-values "first", 123, "second" {

}

@font-feature-values first 123 second 123, third "second" {

}
