user: Give a detailed overview of NodeClosureOutput(NodeInternal): syntax, arguments, return values, common patterns.

assistant: # NodeClosureOutput(NodeInternal)

base classes — [`bpy_struct`](bpy.types.bpy_struct.html#bpy.types.bpy_struct "bpy.types.bpy_struct"), [`Node`](bpy.types.Node.html#bpy.types.Node "bpy.types.Node"), [`NodeInternal`](bpy.types.NodeInternal.html#bpy.types.NodeInternal "bpy.types.NodeInternal")

*class* bpy.types.NodeClosureOutput(*NodeInternal*)
:   active_input_index
    :   Index of the active item

        Type:
        :   int in [0, inf], default 0

    active_output_index
    :   Index of the active item

        Type:
        :   int in [0, inf], default 0

    define_signature
    :   This zone defines a closure signature that should be used by other nodes

        Type:
        :   boolean, default False

    input_items
    :   Type:
        :   [`NodeClosureInputItems`](bpy.types.NodeClosureInputItems.html#bpy.types.NodeClosureInputItems "bpy.types.NodeClosureInputItems") [`bpy_prop_collection`](bpy.types.bpy_prop_collection.html#bpy.types.bpy_prop_collection "bpy.types.bpy_prop_collection") of [`NodeClosureInputItem`](bpy.types.NodeClosureInputItem.html#bpy.types.NodeClosureInputItem "bpy.types.NodeClosureInputItem"), (readonly)

    output_items
    :   Type:
        :   [`NodeClosureOutputItems`](bpy.types.NodeClosureOutputItems.html#bpy.types.NodeClosureOutputItems "bpy.types.NodeClosureOutputItems") [`bpy_prop_collection`](bpy.types.bpy_prop_collection.html#bpy.types.bpy_prop_collection "bpy.types.bpy_prop_collection") of [`NodeClosureOutputItem`](bpy.types.NodeClosureOutputItem.html#bpy.types.NodeClosureOutputItem "bpy.types.NodeClosureOutputItem"), (readonly)

    *classmethod* is_registered_node_type()
    :   True if a registered node type

        Returns:
        :   Result

        Return type:
        :   boolean

    *classmethod* input_template(*index*)
    :   Input socket template

        Parameters:
        :   **index** (*int in* *[**0**,* *inf**]*) – Index

        Returns:
        :   result

        Return type:
        :   [`NodeInternalSocketTemplate`](bpy.types.NodeInternalSocketTemplate.html#bpy.types.NodeInternalSocketTemplate "bpy.types.NodeInternalSocketTemplate")

    *classmethod* output_template(*index*)
    :   Output socket template

        Parameters:
        :   **index** (*int in* *[**0**,* *inf**]*) – Index

        Returns:
        :   result

        Return type:
        :   [`NodeInternalSocketTemplate`](bpy.types.NodeInternalSocketTemplate.html#bpy.types.NodeInternalSocketTemplate "bpy.types.NodeInternalSocketTemplate")

    *classmethod* bl_rna_get_subclass(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The RNA type or default when not found.

        Return type:
        :   [`bpy.types.Struct`](bpy.types.Struct.html#bpy.types.Struct "bpy.types.Struct") subclass

    *classmethod* bl_rna_get_subclass_py(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The class or default when not found.

        Return type:
        :   type