code: func (f *FilterOp) Or(filters ...*FilterOp) *FilterOp {
  	if len(f.OrFilters) == 0 {
  		f.OrFilters = filters[:]
  	} else {
  		f.OrFilters = append(f.OrFilters, filters...)
  	}
  
  	return f
  }
docs: // Or will add an OR op to the filter. One or more FilterOps can be passed in.