code: func (p *PercentilesBucketAggregation) GapPolicy(gapPolicy string) *PercentilesBucketAggregation {
  	p.gapPolicy = gapPolicy
  	return p
  }
docs: // GapPolicy defines what should be done when a gap in the series is discovered.
  // Valid values include "insert_zeros" or "skip". Default is "insert_zeros".