```ruby
module Xcodeproj
  class Project
    module Object
      # Apparently a proxy for a reference object which might belong another
      # project contained in the same workspace of the project document.
      #
      # This class is used for referencing the products of another project.
      #
      class PBXReferenceProxy < AbstractObject
        # @!group Attributes

        # @return [String] the path of the referenced filed.
        #
        attribute :path, String

        # @return [String] the file type of the referenced filed.
        #
        attribute :file_type, String

        # @return [PBXContainerItemProxy] the proxy to the project that
        #         contains the object.
        #
        has_one :remote_ref, PBXContainerItemProxy

        # @return [String] the source tree for the path of the reference.
        #
        # @example
        #   "BUILT_PRODUCTS_DIR"
        #
        attribute :source_tree, String

        #---------------------------------------------------------------------#

        public

        # @!group Helpers

        # Checks whether the reference is a proxy.
        #
        # @return [Bool] always true for this ISA.
        #
        def proxy?
          true
        end

        #---------------------------------------------------------------------#
      end
    end
  end
end
```

Support attribute name for PBXReferenceProxy
user
```ruby
module Xcodeproj
  class Project
    module Object
      # Apparently a proxy for a reference object which might belong another
      # project contained in the same workspace of the project document.
      #
      # This class is used for referencing the products of another project.
      #
      class PBXReferenceProxy < AbstractObject
        # @!group Attributes

        # @return [String] the name of the reference.
        #
        attribute :name, String

        # @return [String] the path of the referenced filed.
        #
        attribute :path, String

        # @return [String] the file type of the referenced filed.
        #
        attribute :file_type, String

        # @return [PBXContainerItemProxy] the proxy to the project that
        #         contains the object.
        #
        has_one :remote_ref, PBXContainerItemProxy

        # @return [String] the source tree for the path of the reference.
        #
        # @example
        #   "BUILT_PRODUCTS_DIR"
        #
        attribute :source_tree, String

        #---------------------------------------------------------------------#

        public

        # @!group Helpers

        # Checks whether the reference is a proxy.
        #
        # @return [Bool] always true for this ISA.
        #
        def proxy?
          true
        end

        #---------------------------------------------------------------------#
      end
    end
  end
end
```
assistant