/* if (deleted) return; */
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
final Label notDeleted = new Label();
mv.visitJumpInsn(IFEQ, notDeleted);
mv.visitInsn(RETURN);
mv.visitLabel(notDeleted);
// deleted = true;
mv.visitVarInsn(ALOAD, 0);
mv.visitInsn(ICONST_1);