fn add_assoc_type_bindings(
db: &RootDatabase,
res: &mut SignatureHelp,
tr: Trait,
args: GenericArgList,
edition: Edition,
)fn add_assoc_type_bindings(
db: &RootDatabase,
res: &mut SignatureHelp,
tr: Trait,
args: GenericArgList,
edition: Edition,
)