code: func NewRandomSourceListSecure() RandomSourceList {
  	return RandomSourceList{
  		RandomSource{
  			Reader: rand.Reader,
  			Weight: DEFAULT_SYS_RAND_SIZE,
  		},
  		RandomSource{
  			Reader: NewRandom(),
  			Weight: DEFAULT_RAIQUB_RAND_SIZE,
  		},
  	}
  }
docs: // NewRandomSourceListSecure returns system provided source of random data
  // besides of Raiqub Random source.