public long readLong(long index) throws IOException {
		return readLong(converter, index);
	}
Returns the signed LONG at <code>index</code>.
@param index the index where the LONG begins
@return the LONG
@exception IOException if an I/O error occurs
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/BinaryReader.java