text: #import "EMAsyncViewAttribute.h"
  #import "EMAsyncConstraint.h"
  #import "EMAsyncLayoutConstraint.h"
  #import "MASUtilities.h"
  @interface EMAsyncViewConstraint : EMAsyncConstraint <NSCopying>
  @property (nonatomic, strong, readonly) EMAsyncViewAttribute *firstViewAttribute;
  @property (nonatomic, strong, readonly) EMAsyncViewAttribute *secondViewAttribute;
  - (id)initWithFirstViewAttribute:(EMAsyncViewAttribute *)firstViewAttribute;
  + (NSArray *)installedConstraintsForView:(MAS_VIEW *)view;
  @end
  