lesscpy/lessc/parser.py
def p_mixin(self, p):
        """ mixin_decl                : open_mixin declaration_list brace_close
        """
        self.scope.add_mixin(Mixin(list(p)[1:], p.lineno(3)).parse(self.scope))
        self.scope.pop()
        p[0] = None
def p_mixin(self, p):
        """ mixin_decl                : open_mixin declaration_list brace_close
        """
        self.scope.add_mixin(Mixin(list(p)[1:], p.lineno(3)).parse(self.scope))
        self.scope.pop()
        p[0] = None
mixin_decl                : open_mixin declaration_list brace_close