def new_group_with_uuid(name, uuid, path = nil, source_tree = :group)
      group = project.new_with_uuid(PBXGroup, uuid)
      children << group
      group.name = name
      group.set_source_tree(source_tree)
      group.set_path(path)
      group
    end
def new_group_with_uuid(name, uuid, path = nil, source_tree = :group)
      group = project.new_with_uuid(PBXGroup, uuid)
      children << group
      group.name = name
      group.set_source_tree(source_tree)
      group.set_path(path)
      group
    end
Creates a new group with given UUID.

 @param [String] uuid UUID of the object.