# Structs
ErrWorkflowDefinitionAlreadyExists is returned when trying to overwrite a WorkflowDefinition.
ErrWorkflowDefinitionNotFound is returned when the database fails to find a WorkflowDefinition.
GetWorkflowDefinitionsByNameAndVersionInput is the query input to GetWorkflowDefinitionsByNameAndVersion.
# Interfaces
Interface for interacting with the workflow-manager database.