workflow

var (
	// ErrDefinitionEntityRequired indicates the workflow definition lacks an entity identifier.
	ErrDefinitionEntityRequired = errors.New("workflow: definition entity required")
	// ErrDefinitionStatesRequired indicates the workflow definition does not declare any states.
	ErrDefinitionStatesRequired = errors.New("workflow: definition requires at least one state")
	// ErrStateNameRequired indicates a workflow state is missing its name.
	ErrStateNameRequired = errors.New("workflow: state name required")
	// ErrDuplicateState indicates duplicate workflow state names were declared.
	ErrDuplicateState = errors.New("workflow: duplicate state")
	// ErrDuplicateDefinition indicates multiple definitions were provided for the same entity.
	ErrDuplicateDefinition = errors.New("workflow: duplicate entity definition")
	// ErrTransitionNameRequired indicates a transition lacks a name.
	ErrTransitionNameRequired = errors.New("workflow: transition name required")
	// ErrTransitionStateUnknown indicates a transition references a state that was not declared.
	ErrTransitionStateUnknown = errors.New("workflow: transition references unknown state")
	// ErrDuplicateTransition indicates the same transition name is declared multiple times for a state.
	ErrDuplicateTransition = errors.New("workflow: duplicate transition for state")
	// ErrInitialStateInvalid indicates the supplied initial state flag is inconsistent or unknown.
	ErrInitialStateInvalid = errors.New("workflow: invalid initial state")
)