Update src/main/java/com/github/_1c_syntax/bsl/languageserver/references/ReferenceIndexFiller.java

Co-authored-by: Nikita Fedkin <nixel2007@gmail.com>

Author: artbear

src/main/java/com/github/_1c_syntax/bsl/languageserver/references/ReferenceIndexFiller.java

@@ -89,7 +89,7 @@ public void fill(DocumentContext documentContext) {
   private class MethodSymbolReferenceIndexFinder extends BSLParserBaseVisitor<BSLParserRuleContext> {
 
     private final DocumentContext documentContext;
-    private Collection<String> commonModuleMdoRefFromSubParams = Collections.emptySet();
+    private Set<String> commonModuleMdoRefFromSubParams = Collections.emptySet();
 
     @Override
     public BSLParserRuleContext visitProcDeclaration(BSLParser.ProcDeclarationContext ctx) {