# File lib/rgen/model_builder/builder_context.rb, line 163
    def packageByCommand(contextPackage, name)
      return @packageByCommand[[contextPackage, name]] if @packageByCommand.has_key?([contextPackage, name])
      if @extensionFactory.extensionContainer(contextPackage).respond_to?(name)
        result = contextPackage
      else
        className = name.to_s[0..0].upcase + name.to_s[1..-1]
        eClass = contextPackage.eClasses.find{|c| c.name == className}
        if eClass
          result = contextPackage
        elsif contextPackage != @rootPackage
          result = packageByCommand(contextPackage.eSuperPackage, name)
        else
          result = nil
        end
      end
      @packageByCommand[[contextPackage, name]] = result
    end