public boolean wasSuccessful() {
		return success;
	}
Creates a background command for moving memory blocks. The memory block
is moved from its current start address to its new start address. After
the command has completed, getStatus() can be called to check the
success. If unsuccessful, getStatusMsg() can be called to get a message
indicating why the command failed.

@param program the program whose memory map is being modified
@param currentStart the start address of the block before the move.
@param newStart the start address of the block after the move.
@param listener listener that will be notified when the move block has
           completed.
Ghidra/Features/Base/src/main/java/ghidra/app/cmd/memory/MoveBlockTask.java