private void putByte(long offset, byte b) throws MemoryAccessException {
		SubMemoryBlock subBlock = getSubBlock(offset);
		memMap.lock.acquire();
		try {
			subBlock.putByte(offset, b);
		}
		catch (IOException e) {
			memMap.dbError(e);
		}
		finally {
			memMap.lock.release();
		}
	}
Get collection of blocks which map onto this block.

@return collection of blocks which map onto this block or null if none identified
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/MemoryBlockDB.java