public String normalizeSourceId(String aSourceId){
  if (!isSourceCaseSensitive()) {
    return (aSourceId == null ? null : aSourceId.toLowerCase());
  }
 else {
    return aSourceId;
  }
}

public String normalizeSourceId ( String aSourceId ) { if ( ! isSourceCaseSensitive ( ) ) { return ( aSourceId == null ? null : aSourceId . toLowerCase ( ) ) ; } else { return aSourceId ; } }
normalizes the source id if required , e . g . make lower case for case insensitive id comparison purposes
