text: #include "rocksdb/db.h"
  #include "rocksdb/write_batch.h"
  #include <ruby.h>
  
  extern "C" {
  
  
    typedef VALUE (*METHOD)(...);
  
    VALUE rocksdb_write_batch_init();
    VALUE batch_alloc(VALUE klass);
    VALUE rocksdb_write_batch_put(VALUE self, VALUE v_key, VALUE v_value);
    VALUE rocksdb_write_batch_delete(VALUE self, VALUE v_key);
  }
  