How to find where an import item will come from for auto execute query?

Question

I am trying to get a standalone stackLayout region to automatically execute the query on a VO when I run a test.
I found this thread, Re: Table creation and Data Population and tried adding the suggested code into my <companyname>.oracle.apps.fnd.framework.toolbox.server.<companyname>WorklistAMImpl. java, without the "if" clause wrapper.
if(pageContext.getParameter("Submit") != null)
OAApplicationModule am = pageContext.getApplicationModule(webBean);
OAViewObject vo = (OAViewObject)am.findViewObject("EmployeeVO1");
OATableBean table = (OATableBean)webBean.findChildRecursive("ResultTable");
table.queryData(pageContext, false);
However, when I try to compile, I get errors that the variable webBean, variable pageContext, and class OATableBean are not found in my class <companyname>.oracle.apps.fnd.framework.toolbox.server.<companyname>WorklistAMImpl. I had a couple others missing classes, which I figured out where they were and included them as imports.
My questions are:
1. Did I put this code in the right place?
2. How do I find out where the OATableBean exists (and generically, how do I find where a class exists, for future reference)?
3. In the case of the referenced note, how should I define the webBean and pageContext variables?
Thanks.
- Pam

Answer 1

I found where the OATableBean was defined, but I'd still like to know in general how to find classes. Is there a utility I can run that would list what's where?
Also, I figured out for the webBean and pageContext that I needed to import OAwebBean and OApageContext and then define the parameters in stream, so onw I'm successfully compiling; however, I still get "No search conducted" on the test rather than actually seeing the results of the VO. So, I sitll wonder if I have the code in the right place, or am I missing another piece? For instance, since my VO is based on a multi-org view, do I need to do something similar to set_client_info? Even if I did have to do that, I would expect a no data found rather than a no search conducted message.
The view code is as follows (note, I have commented out the bind variable for now and hard coded which distribution I want to find, so I expect it to get one row returned):
SELECT ReqDistributionsEO.DISTRIBUTION_ID,
ReqDistributionsEO.DISTRIBUTION_NUM,
ReqDistributionsEO.REQ_LINE_QUANTITY,
ReqDistributionsEO.REQ_LINE_AMOUNT,
ReqDistributionsEO.EXPENDITURE_TYPE,
ReqDistributionsEO.EXPENDITURE_ITEM_DATE
,prl.line_num
,pp.name project_name
,pt.task_number
     ,gcc.concatenated_segments
FROM PO_REQ_DISTRIBUTIONS ReqDistributionsEO
,po_requisition_lines prl
     ,pa_projects pp
     ,pa_tasks_v pt
     ,gl_code_combinations_kfv gcc
where ReqDistributionsEO.REQUISITION_LINE_ID = prl.REQUISITION_LINE_ID
and prl.requisition_header_id = 14247-- :1
and pp.project_id = ReqDistributionsEO.project_id
and pt.task_id = ReqDistributionsEO.task_id
and gcc.code_combination_id = ReqDistributionsEO.code_combination_id
Please help.