With a Catchall field is is possible to base a conditional on a catchall field?
To borrow the example code over on Devot-ee:
{exp:channel:entries channel="site"}
{!-- CHECK IF {ADDRESS} FIELD IS POPULATED TO DETERMINE CONTENT IS DISPLAYED --}
<div class="details">
{customer_details}
{contact_info}
Name: {name}
Address: {address}
City: {city}
State: {state}
Zip: {zip}
{/contact_info}
{/customer_details}
</div>
{/exp:channel:entries}
If I only want to my details DIV to display if the {address} field has been filled out, if I want to get more granular, more sub-atomic, how would I do that?