diff --git a/android/filegroup.go b/android/filegroup.go
index 7d39238..e609f63 100644
--- a/android/filegroup.go
+++ b/android/filegroup.go
@@ -16,6 +16,7 @@
 
 import (
 	"path/filepath"
+	"regexp"
 	"strings"
 
 	"android/soong/bazel"
@@ -37,6 +38,34 @@
 	return ctx.OtherModuleType(m) == "filegroup"
 }
 
+var (
+	// ignoring case, checks for proto or protos as an independent word in the name, whether at the
+	// beginning, end, or middle. e.g. "proto.foo", "bar-protos", "baz_proto_srcs" would all match
+	filegroupLikelyProtoPattern = regexp.MustCompile("(?i)(^|[^a-z])proto(s)?([^a-z]|$)")
+	filegroupLikelyAidlPattern  = regexp.MustCompile("(?i)(^|[^a-z])aidl([^a-z]|$)")
+
+	ProtoSrcLabelPartition = bazel.LabelPartition{
+		Extensions:  []string{".proto"},
+		LabelMapper: isFilegroupWithPattern(filegroupLikelyProtoPattern),
+	}
+	AidlSrcLabelPartition = bazel.LabelPartition{
+		Extensions:  []string{".aidl"},
+		LabelMapper: isFilegroupWithPattern(filegroupLikelyAidlPattern),
+	}
+)
+
+func isFilegroupWithPattern(pattern *regexp.Regexp) bazel.LabelMapper {
+	return func(ctx bazel.OtherModuleContext, label bazel.Label) (string, bool) {
+		m, exists := ctx.ModuleFromName(label.OriginalModuleName)
+		labelStr := label.Label
+		if !exists || !IsFilegroup(ctx, m) {
+			return labelStr, false
+		}
+		likelyMatched := pattern.MatchString(label.OriginalModuleName)
+		return labelStr, likelyMatched
+	}
+}
+
 // https://docs.bazel.build/versions/master/be/general.html#filegroup
 type bazelFilegroupAttributes struct {
 	Srcs bazel.LabelListAttribute
@@ -232,3 +261,16 @@
 		return fg.GetBazelLabel(ctx, fg)
 	}
 }
+
+// Given a name in srcs prop, check to see if the name references a filegroup
+// and the filegroup is converted to aidl_library
+func IsConvertedToAidlLibrary(ctx BazelConversionPathContext, name string) bool {
+	if module, ok := ctx.ModuleFromName(name); ok {
+		if IsFilegroup(ctx, module) {
+			if fg, ok := module.(Bp2buildAidlLibrary); ok {
+				return fg.ShouldConvertToAidlLibrary(ctx)
+			}
+		}
+	}
+	return false
+}