func LengthToSpan(length int64) []byte {
	span := make([]byte, SpanSize)
	binary.LittleEndian.PutUint64(span, uint64(length))
	return span
}
// LengthToSpan creates a binary data span size representation.
// It is required for calculating the BMT hash.
LengthToSpan creates a binary data span size representation.
It is required for calculating the BMT hash.
// LengthToSpan creates a binary data span size representation . // It is required for calculating the BMT hash .
func LengthToSpan(length int64) []byte {
	span := make([]byte, SpanSize)
	binary.LittleEndian.PutUint64(span, uint64(length))
	return span
}
func LengthToSpan ( length int64 ) [ ] byte { span := make ( [ ] byte , SpanSize ) binary . LittleEndian . PutUint64 ( span , uint64 ( length ) ) return span }
LengthToSpan creates a binary data span size representation.
LengthToSpan creates a binary data span size representation .