code: public OBinarySerializer<?> getObjectSerializer(final byte identifier) {
      OBinarySerializer<?> impl = serializerIdMap.get(identifier);
      if (impl == null) {
        final Class<? extends OBinarySerializer<?>> cls = serializerClassesIdMap.get(identifier);
        if (cls != null)
          try {
            impl = cls.newInstance();
          } catch (Exception e) {
            OLogManager.instance().error(this, "Cannot create an instance of class %s invoking the empty constructor", cls);
          }
      }
      return impl;
    }
docs: Obtain OBinarySerializer instance by it's id.
  
  @param identifier
  is serializes identifier.
  @return OBinarySerializer instance.