index_exists?

# File activerecord/lib/active_record/migration/compatibility.rb, line 457
        def index_exists?(table_name, column_name = nil, **options)
          column_names = Array(column_name).map(&:to_s)
          options[:name] =
            if options[:name].present?
              options[:name].to_s
            else
              connection.index_name(table_name, column: column_names)
            end
          super
        end