protected CtClass getExceptionClass() throws NotFoundException {
        if (exceptionClass == null) {
            exceptionClass = classPool.get(getException());
        }
        return exceptionClass;
    }
An abstract transform that wraps target code with try-catch.

<p> See {@link ConstructorCallTryCatchTransformer}, {@link ConstructorExecutionTryCatchTransformer},
{@link InitializerExecutionTryCatchTransformer}, {@link MethodCallTryCatchTransformer},
{@link MethodCallTryCatchTransformer}
plugin/src/main/groovy/com/didichuxing/tools/droidassist/transform/enhance/TryCatchTransformer.java