pub(crate) fn load_generator_ast_to_generator(
loadgen: &LoadGenerator,
options: &[LoadGeneratorOption<Aug>]
) -> Result<(LoadGenerator, Option<BTreeMap<FullItemName, (usize, RelationDesc)>>), PlanError>
pub(crate) fn load_generator_ast_to_generator(
loadgen: &LoadGenerator,
options: &[LoadGeneratorOption<Aug>]
) -> Result<(LoadGenerator, Option<BTreeMap<FullItemName, (usize, RelationDesc)>>), PlanError>