dap4/d4core/src/main/java/dap4/core/dmr/parser/bison/Dap4ParserImpl.java
DapGroup
    getGroupScope()
            throws DapException
    {
        DapGroup gscope = (DapGroup) searchScope(DapSort.GROUP, DapSort.DATASET);
        if(gscope == null) throw new DapException("Undefined Group Scope");
        return gscope;
    }
DapGroup
    getGroupScope()
            throws DapException
    {
        DapGroup gscope = (DapGroup) searchScope(DapSort.GROUP, DapSort.DATASET);
        if(gscope == null) throw new DapException("Undefined Group Scope");
        return gscope;
    }
Parser specific methods