cdm/src/main/java/ucar/nc2/iosp/misc/AbstractLightningIOSP.java
protected void addLightningGlobalAttributes(NetcdfFile ncfile) {
        ncfile.addAttribute(null, new Attribute(CF.FEATURE_TYPE, CF.FeatureType.point.toString()));
        ncfile.addAttribute( null, new Attribute(CDM.HISTORY, "Read directly by Netcdf Java IOSP"));
    }
protected void addLightningGlobalAttributes(NetcdfFile ncfile) {
        ncfile.addAttribute(null, new Attribute(CF.FEATURE_TYPE, CF.FeatureType.point.toString()));
        ncfile.addAttribute( null, new Attribute(CDM.HISTORY, "Read directly by Netcdf Java IOSP"));
    }
Add the global attributes.  Specific implementations should call super
and then add their own.
@param ncfile  the file to add to