public long getFileOffset() {
		return fileOffset;
	}
Returns the offset in the original file from where these bytes originated. Normally this will
be 0, but in the case where the program is actually a piece in some other file (e.g. tar,zip),
this will be the offset into the file corresponding to the first byte in this FileBytes object.

@return  the offset in the original file from where these bytes originated.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/FileBytes.java