message: fix(language-service): look for type constructors on canonical symbol
diff: @@ -700,8 +700,9 @@ class TypeScriptSymbolQuery implements SymbolQuery {
  return spanAt(this.source, line, column);
  }
  - private getTemplateRefContextType(type: ts.Symbol): ts.Symbol|undefined {
  - const constructor = type.members && type.members !['__constructor'];
  + private getTemplateRefContextType(typeSymbol: ts.Symbol): ts.Symbol|undefined {
  + const type = this.checker.getTypeOfSymbolAtLocation(typeSymbol, this.source);
  + const constructor = type.symbol && type.symbol.members && type.symbol.members['__constructor'];
  if (constructor) {
  const constructorDeclaration = constructor.declarations ![0] as ts.ConstructorTypeNode;
  for (const parameter of constructorDeclaration.parameters) {
  