adds CtClass#isKotlin() for PR #276

src/main/javassist/CtBehavior.java

@@ -858,6 +858,11 @@ public abstract class CtBehavior extends CtMember {
      *                  generate the original bytecode.
      *                  The other <code>insertAfter</code> methods calls this method
      *                  with <code>false</code> for this parameter.
+     *                  A tip is to pass <code>this.getDeclaringClass().isKotlin()</code>
+     *                  to this parameter.
+     *
+     * @see CtClass#isKotlin()
+     * @see #getDeclaringClass()
      * @since 3.26
      */
     public void insertAfter(String src, boolean asFinally, boolean redundant)

src/main/javassist/CtClass.java

@@ -332,6 +332,14 @@ public abstract class CtClass {
         return false;
     }
 
+    /**
+     * Returns <code>true</code> if this object represents a Kotlin class.
+     * @since 3.26
+     */
+    public boolean isKotlin() {
+        return hasAnnotation("kotlin.Metadata");
+    }
+
     /**
      * If this object represents an array, this method returns the component
      * type of the array.  Otherwise, it returns <code>null</code>.