public long getFileOffset() {
		if (mappedInfo != null) {
			return mappedInfo.getFileOffset();
		}

		if (fileBytes != null) {
			return sourceInfo.getFileBytesOffset(address) + fileBytes.getFileOffset();
		}
		return -1;
	}
Returns the offset into the originally imported file that provided the byte value for the
associated address or -1 if there is no source information for this location.
@return  the offset into the originally imported file that provided the byte value for the
associated address.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/AddressSourceInfo.java