valid_const?

# File railties/lib/rails/generators/rails/plugin/plugin_generator.rb, line 307
      def valid_const?
        if original_name =~ /[^0-9a-zA-Z_]+/
          raise Error, "Invalid plugin name #{original_name}. Please give a name which use only alphabetic or numeric or \"_\" characters."
        elsif camelized =~ /^\d/
          raise Error, "Invalid plugin name #{original_name}. Please give a name which does not start with numbers."
        elsif RESERVED_NAMES.include?(name)
          raise Error, "Invalid plugin name #{original_name}. Please give a name which does not match one of the reserved rails words."
        elsif Object.const_defined?(camelized)
          raise Error, "Invalid plugin name #{original_name}, constant #{camelized} is already in use. Please choose another plugin name."
        end
      end