code: func (q *MoreLikeThisQuery) MinimumShouldMatch(minimumShouldMatch string) *MoreLikeThisQuery {
  	q.minimumShouldMatch = minimumShouldMatch
  	return q
  }
docs: // MinimumShouldMatch sets the number of terms that must match the generated
  // query expressed in the common syntax for minimum should match.
  // The default value is "30%".
  //
  // This used to be "PercentTermsToMatch" in Elasticsearch versions before 2.0.