How do I set modifier on a member?

you suffix member declaration with 'is' and the modifier

{{{
#!cobra
class HasAMember
  def doSomething is protected
    pass
}}}

How do I set multiple modifier on a member?

you suffix member declaration with 'is' and a comma delimited list of modifier

{{{
#!cobra
class OverridesAMember
  def doSomething is protected, override
    pass
}}}

You can add attributes to classes and functions and variables also properties
e.g. In GTK
{{{
#!cobra
class HasAnAttribute
  has TreeNode(listOnly=true)

  var name is String
      has TreeNodeValue(column=0)

  def doSomething is protected, override has STAThread
    pass
}}}

Usually we need to indent the code for the attribute