S2sOpportunityService (coeus-api-all 2201.0002 API)

```
public interface S2sOpportunityService
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`S2sOpportunityContract`	`findS2SOpportunityByProposalNumber(String proposalNumber)`	This method retrieves and S2S Opportunity by proposal number.

- Method Detail
  - findS2SOpportunityByProposalNumber
```
S2sOpportunityContract findS2SOpportunityByProposalNumber(String proposalNumber)
```
    This method retrieves and S2S Opportunity by proposal number. The proposal number cannot be blank. Will return null if non is found.
    
    Parameters:
    
    proposalNumber - the proposal number. Cannot be blank.
    
    Returns:
    
    the S2sOpportunity or null.
    
    Throws:
    
    IllegalArgumentException - if proposal number is blank