code: func (bb *Builder) SetShareSearch(q SearchQuery) *Builder {
  	if bb.Type() != "claim" || bb.ClaimType() != ShareClaim {
  		panic("called SetShareSearch on non-share")
  	}
  	bb.m["search"] = q
  	return bb
  }
docs: // SetShareSearch sets the search of share claim.
  // q is assumed to be of type *search.SearchQuery.
  // It panics if bb isn't a "share" claim type.