interface

@dataclass
class InputAttribute:
    """ Represents an input attribute for a workflow node.
    """
    name: str
    type: Type = Any
    description: str = ""
    default: Any = None
    allow_multi_connection: bool = False
    widget: dict[str, Any] = field(default_factory=dict)

@dataclass
class OutputAttribute:
    """ Represents an input attribute for a workflow node.
    """
    name: str
    type: Type = Any
    description: str = ""

@dataclass
class WorkflowNode:
    """ Base class for available workflow UI nodes.
    """
    name: str
    version: str
    inputs: list[InputAttribute]
    outputs: list[OutputAttribute]
    description: str = ""
    implementation: Optional[Union[type, WorkflowNodeImplementation]] = None

@dataclass
class WorkflowNodeImplementation:
    """ Implementation from functions.
    """
    module: Any
    func: Optional[Callable]
    revert_func: Optional[Callable] = None