code: @Override
  	public void visitInsn(int opcode) {
  		switch (opcode) {
  		case RETURN:
  		case IRETURN:
  		case FRETURN:
  		case ARETURN:
  		case LRETURN:
  		case DRETURN:
  			onMethodExit(opcode);
  			break;
  		}
  		super.visitInsn(opcode);
  	}
docs: /* (non-Javadoc)
  @see org.objectweb.asm.tree.MethodNode#visitInsn(int)