# File lib/new_relic/agent/configuration/default_source.rb, line 185
        def self.convert_to_constant_list(raw_value)
          const_names = convert_to_list(raw_value)
          const_names.map! do |class_name|
            const = ::NewRelic::LanguageSupport.constantize(class_name)

            unless const
              NewRelic::Agent.logger.warn("Ignoring unrecognized constant '#{class_name}' in #{raw_value}")
            end

            const
          end
          const_names.compact
        end