code: func (textRank *TextRank) Ranking(algorithm rank.Algorithm) {
  	rank.Calculate(textRank.rank, algorithm)
  }
docs: // Ranking method counts the words and connections between the words, then it
  // weights the numbers then normalize them in type float32 between 0.00 and
  // 1.00. This is the 6th step to use TextRank.
  //
  // algorithm Algorithm is the object of the weighting and scoring methods.