public Layout getLayout(Address addr) {
		BigInteger index = addressToIndexMap.getIndex(addr);
		return getLayout(index);
	}
Attempts to find a field location for the given address from the given program location
@param address the address to try and get a layout for.
@param location the location contains other information needed to generate a field
location
@param useDefaultLocation if true, will return a generic location for this address
if no field has a specific match.  Otherwise, will return null if no fields have
an exact match.
@return a field location for the given address.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/listingpanel/ListingModelAdapter.java