func NewExerciseWriterSize(wr glukitio.ExerciseBatchWriter, flushSize int) *BufferedExerciseBatchWriter {
	return newExerciseWriterSize(wr, nil, 0, flushSize)
}
NewExerciseWriterSize returns a new Writer whose buffer has the specified size.
package bufio
import (
	"github.com/alexandre-normand/glukit/app/apimodel"
	"github.com/alexandre-normand/glukit/app/container"
	"github.com/alexandre-normand/glukit/app/glukitio"
)
type BufferedExerciseBatchWriter struct {
	head      *container.ImmutableList
	size      int
	flushSize int
	wr        glukitio.ExerciseBatchWriter
}