func (ix *RuleIndex) FindRulesByImport(imp ImportSpec, lang string) []FindResult {
	matches := ix.importMap[imp]
	results := make([]FindResult, 0, len(matches))
	for _, m := range matches {
		if ix.mrslv(m.rule, "").Name() != lang {
			continue
		}
		results = append(results, FindResult{
			Label:  m.label,
			Embeds: m.embeds,
		})
	}
	return results
}
func (ix *RuleIndex) FindRulesByImport(imp ImportSpec, lang string) []FindResult {
	matches := ix.importMap[imp]
	results := make([]FindResult, 0, len(matches))
	for _, m := range matches {
		if ix.mrslv(m.rule, "").Name() != lang {
			continue
		}
		results = append(results, FindResult{
			Label:  m.label,
			Embeds: m.embeds,
		})
	}
	return results
}
// FindRulesByImport attempts to resolve an import string to a rule record.
// imp is the import to resolve (which includes the target language). lang is
// the language of the rule with the dependency (for example, in
// go_proto_library, imp will have ProtoLang and lang will be GoLang).
// from is the rule which is doing the dependency. This is used to check
// vendoring visibility and to check for self-imports.
//
// FindRulesByImport returns a list of rules, since any number of rules may
// provide the same import. Callers may need to resolve ambiguities using
// language-specific heuristics.