diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 31665734167..a2338c5ba5b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -429,7 +429,13 @@ namespace ts {
             // return undefined if we can't find a symbol.
         }
 
-        function getSymbolOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[] {
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols 
+         */
+        function getSymbolOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): [Symbol, Symbol] {
             const constructoDeclaration = parameter.parent;
             const classDeclaration = parameter.parent.parent;
 
diff --git a/src/services/services.ts b/src/services/services.ts
index 4f2af5c35c4..6728c0d5ebc 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -6045,8 +6045,6 @@ namespace ts {
                     });
                 }
 
-                // If the reference
-
                 // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
                 // Or a union property, use its underlying unioned symbols
                 return forEach(typeChecker.getRootSymbols(referenceSymbol), rootSymbol => {