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- (IBAction) didEnterSearchTerm:(id)sender {
    
    if ([self.searchTxt.text length] == 0) return;
    [self displayLoadingViewAndDisableUI];
    
    // contact Apple for geocode
    CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
    
    // User enters a search term (e.g. springfield united states of america) and Apple's server responds with an array of placemarks that
    // match the entered search term.

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@interface NSString (Extension)

- (BOOL) isAnEmail;
- (BOOL) isNumeric;

@end

@implementation NSString (Extension)

/**

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@protocol KmlDownloaderProtocol <NSObject>

- (void) downloadFileFrom:(NSString*)urlString isAsyncDownload:(BOOL)isAsync;
- (NSURL*) urlForKmlFile;

@end

@interface KmlDownloader : NSObject <KmlDownloaderProtocol>