class PgSearch::Features::Trigram

def conditions
  if options[:threshold]
    Arel::Nodes::Grouping.new(
      similarity.gteq(options[:threshold])
    )
  else
    Arel::Nodes::Grouping.new(
      Arel::Nodes::InfixOperation.new(
        infix_operator,
        normalized_query,
        normalized_document
      )
    )
  end
end