Add @DocumentExample to IsNotEmptyToJdkTest

Author: timtebeek

src/test/java/org/openrewrite/java/migrate/apache/commons/lang/IsNotEmptyToJdkTest.java

@@ -15,8 +15,10 @@
  */
 package org.openrewrite.java.migrate.apache.commons.lang;
 
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
+import org.openrewrite.DocumentExample;
 import org.openrewrite.java.JavaParser;
 import org.openrewrite.test.RecipeSpec;
 import org.openrewrite.test.RewriteTest;
@@ -31,6 +33,28 @@ public void defaults(RecipeSpec spec) {
           .recipe(new IsNotEmptyToJdk());
     }
 
+    @Test
+    @DocumentExample
+    void exampleUse() {
+        rewriteRun(
+          // language=java
+          java("""
+            import org.apache.commons.lang3.StringUtils;
+
+            class A {
+                boolean test(String first) {
+                    return StringUtils.isEmpty(first);
+                }
+            }
+            """, """
+            class A {
+                boolean test(String first) {
+                    return first == null || first.isEmpty();
+                }
+            }
+            """));
+    }
+
     @ParameterizedTest
     @CsvSource(delimiter = '#', textBlock = """
       org.apache.commons.lang3.StringUtils # StringUtils.isEmpty(first) # first == null || first.isEmpty()