code: func (q *MultiMatchQuery) TieBreaker(tieBreaker float64) *MultiMatchQuery {
  	q.tieBreaker = &tieBreaker
  	return q
  }
docs: // TieBreaker for "best-match" disjunction queries (OR queries).
  // The tie breaker capability allows documents that match more than one
  // query clause (in this case on more than one field) to be scored better
  // than documents that match only the best of the fields, without confusing
  // this with the better case of two distinct matches in the multiple fields.
  //
  // A tie-breaker value of 1.0 is interpreted as a signal to score queries as
  // "most-match" queries where all matching query clauses are considered for scoring.