// need to index one copy.
				r.nonesByPath[q.pattern] = q
			}
		}
	}

	return r
}

// initialSelected returns the version of the module with the given path that
// was selected at the start of this 'go get' invocation.
func (r *resolver) initialSelected(mPath string) (version string) {
	v, ok := r.initialVersion[mPath]
	if !ok {
		return "none"
	}
	return v
}