If interface method has generic parameters, interface is not functional.

compiler/testData/loadJava/compiledJava/singleAbstractMethod/GenericMethodParameters.java

@@ -0,0 +1,7 @@
+package test;
+
+import java.util.List;
+
+public interface GenericMethodParameters {
+    <A extends CharSequence, B extends List<A>> void method(A[] a, B b);
+}

compiler/testData/loadJava/compiledJava/singleAbstractMethod/GenericMethodParameters.txt

@@ -0,0 +1,5 @@
+package test
+
+public trait GenericMethodParameters : java.lang.Object {
+    public abstract fun </*0*/ A : jet.CharSequence?, /*1*/ B : jet.List<A>?> method(/*0*/ p0 : jet.Array<out A>?, /*1*/ p1 : B?) : jet.Unit
+}