code: @Override
  	public SqlBatch paramStream(final Stream<?> stream) {
  		if (this.stream == null) {
  			this.stream = stream;
  		} else {
  			this.stream = Stream.concat(this.stream, stream);
  		}
  		return this;
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.fluent.SqlBatch#paramStream(java.util.stream.Stream)