private Address addr(long offset) {
		return space.getAddress(offset);
	}
quick and dirty test of the ProgramContextImpl just to see
if the values are being set for specified address range.
The ProgramContextPlugin will be a more complete test
program, with a gui interface to specify the values and
select/highlight an address range.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/util/ProgramContextTest.java