ios - How to test if a variable is declared? -

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I can test that an asset exists in this way: 

  #import & Lt; Objc / runtime.h & gt; - (zero) testcachedPublicFeedExists {objc_property_t prop = class_getProperty ([store class], "cachedPublicFeed"); XCTAssertTrue (hop); }   
 But how can I test if a class variable like  cachedvar  exists?  
  @interfaceFTDataStoreBase: NSObject {NSMutableArray * cachedVar; }   
 
 
 You can use these methods  class_getInstanceVariable  Or  Class_getClassVariable .  
  - (zero) testcachedVarExists {Ivar ivar = class_getInstanceVariable ([Store class], "CachedWire"); XCTAssertTrue (Ever); }   
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