protected boolean suppress(String attrname)
    {
        if (attrname.startsWith("_Coord")) return true;
        if (attrname.equals(CDM.UNSIGNED))
            return true;
        return false;
    }
protected boolean suppress ( String attrname ) { if ( attrname . startsWith ( "_Coord" ) ) return true ; if ( attrname . equals ( CDM . UNSIGNED ) ) return true ; return false ; }
Some attributes that are added by the NetcdfDataset
need to be kept out of the DMR. This function
defines that set.

@param attrname A non-escaped attribute name to be tested for suppression
@return true if the attribute should be suppressed, false otherwise.