private String getOverlayBaseSpaceName(MemoryBlock block) {
		AddressSpace space = block.getStart().getAddressSpace();
		if (space instanceof OverlayAddressSpace ovSpace) {
			return ovSpace.getOverlayedSpace().getName();
		}
		return "";
	}
Create a new initialized block based on the given uninitialized block.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/memory/MemoryMapModel.java