Fix for detecting lib/src. Sort fixes by relevance.

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 16ac99c5af24531ecd57a5733061fcc8197e176d..52fe2130b214f9c8a3b17accfd5ff0301c77fd64 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -1580,9 +1580,7 @@ class FixProcessor {
         }
         // Compute the fix kind.
         FixKind fixKind;
-        if (resourceProvider.pathContext
-            .split(librarySource.fullName)
-            .contains('src')) {
+        if (_isLibSrcPath(librarySource.fullName)) {
           // Bad: non-API.
           fixKind = DartFixKind.IMPORT_LIBRARY_PROJECT3;
         } else if (declaration.isExported) {
@@ -2809,6 +2807,16 @@ class FixProcessor {
     return node is SimpleIdentifier && node.name == 'await';
   }
 
+  bool _isLibSrcPath(String path) {
+    List<String> parts = resourceProvider.pathContext.split(path);
+    for (int i = 0; i < parts.length - 2; i++) {
+      if (parts[i] == 'lib' && parts[i + 1] == 'src') {
+        return true;
+      }
+    }
+    return false;
+  }
+
   /**
    * Removes any [ParenthesizedExpression] enclosing [expr].
    *