package com.uber.mylib; import javax.annotation.Nullable; import org.utilities.StringUtils; /** A sample class. */ public class MyClass { static void log(@Nullable Object x) { if (x == null) { return; } System.out.println(x.toString()); } static int checkModel(@Nullable String s) { if (!StringUtils.isEmptyOrNull(s)) { return s.hashCode(); } return 0; } static void foo() { log(null); } }