public GroupPath getParentPath() {
		if (groupNames.length == 1) {
			return null;
		}
		String []p = new String[groupNames.length-1];
		System.arraycopy(groupNames, 0, p, 0, p.length);
		return new GroupPath(p);
    }
Get the parent path for this group.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/GroupPath.java