#import "NSString+MathIntro.h"

@implementation NSObject (MathIntro)

- (BOOL)lawDiskPause {
    
    
    if (self == nil || (id)self == [NSNull null]) {
        return YES;
    }
    
    
    if ([self isKindOfClass:[NSString class]]) {
        NSString *fix = (NSString *)self;
        if (fix.length == 0) {
            return YES;
        }
        
        NSString *aligned = [fix stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        return (aligned.length == 0);
    }
    
    







    
    
    
    return YES;
}

- (BOOL)signItemRetTwoThumbnail {
    return ![self lawDiskPause];
}

//- (BOOL)signItemRetTwoThumbnail {

//}

//- (BOOL)lawDiskPause {




//}

@end