code: protected void silentlyVisitMethodNode(final MethodNode directMethodCallCandidate) {
          // visit is authorized because the classnode belongs to the same source unit
          ErrorCollector collector = new ErrorCollector(typeCheckingContext.getErrorCollector().getConfiguration());
          startMethodInference(directMethodCallCandidate, collector);
      }
docs: visit a method call target, to infer the type. Don't report errors right
  away, that will be done by a later visitMethod call