* Useful to preregister classes (speed+size gain, no classnames written!).
* E.g. new DefaultCoder(MyValue.class, MyOtherValue.class, .. )
*/
public FSTAsciiStringOffheapMap(String mappedFile, int keyLen, long sizeMemBytes, int numberOfElems,FSTCoder coder) throws Exception {
super(mappedFile, keyLen, sizeMemBytes, numberOfElems, coder);
tmpKey = new LeftCutStringByteSource(null,0,keyLen);
}