tds/src/main/java/thredds/featurecollection/InvDatasetFeatureCollection.java
public ucar.nc2.dt.grid.GridDataset getGridDataset(String matchPath) throws IOException {
    return null;
  }
public ucar.nc2.dt.grid.GridDataset getGridDataset(String matchPath) throws IOException {
    return null;
  }
Get the associated Grid Dataset, if any. called by DatasetHandler.openGridDataset()

@param matchPath match.remaining
@return Grid Dataset, or null if n/a
@throws IOException on error