ref: b90593c9b83f71de343e27cd1b489dff79bd4ac7
dir: /reachability/walk_expand.go/
package reachability
func (walk *Walk) expand(item walkItem) ([]walkItem, error) {
if walk.domain == DomainCommits {
return walk.expandCommits(item)
}
return walk.expandObjects(item)
}