dap4/d4cdm/src/main/java/dap4/cdm/dsp/CDMDSP.java
public CDMDSP open(NetcdfDataset ncd)
            throws DapException
    {
        assert this.context != null;
        this.dmrfactory = new DMRFactory();
        this.ncdfile = ncd;
        setLocation(this.ncdfile.getLocation());
        buildDMR();
        return this;
    }
public CDMDSP open(NetcdfDataset ncd)
            throws DapException
    {
        assert this.context != null;
        this.dmrfactory = new DMRFactory();
        this.ncdfile = ncd;
        setLocation(this.ncdfile.getLocation());
        buildDMR();
        return this;
    }
Provide an extra API for use in testing

@param ncd
@return
@throws DapException