declare namespace ObjC{
   namespace classes{
      
       export class UICollectionViewFlowLayout extends UICollectionViewLayout{ 
            	minimumLineSpacing():number;
            	setMinimumLineSpacing_(minimumLineSpacing:number|NativePointer):any;
            	minimumInteritemSpacing():number;
            	setMinimumInteritemSpacing_(minimumInteritemSpacing:number|NativePointer):any;
            	itemSize():number;
            	setItemSize_(itemSize:number|NativePointer):any;
            	estimatedItemSize():number;
            	setEstimatedItemSize_(estimatedItemSize:number|NativePointer):any;
            	scrollDirection():any;
            	setScrollDirection_(scrollDirection:any|NativePointer):any;
            	headerReferenceSize():number;
            	setHeaderReferenceSize_(headerReferenceSize:number|NativePointer):any;
            	footerReferenceSize():number;
            	setFooterReferenceSize_(footerReferenceSize:number|NativePointer):any;
            	sectionInset():number;
            	setSectionInset_(sectionInset:number|NativePointer):any;
            	sectionInsetReference():any;
            	setSectionInsetReference_(sectionInsetReference:any|NativePointer):any;
            	sectionHeadersPinToVisibleBounds():number;
            	setSectionHeadersPinToVisibleBounds_(sectionHeadersPinToVisibleBounds:number|NativePointer):any;
            	sectionFootersPinToVisibleBounds():number;
            	setSectionFootersPinToVisibleBounds_(sectionFootersPinToVisibleBounds:number|NativePointer):any;
       }
      
       export class UICollectionViewFlowLayoutInvalidationContext extends UICollectionViewLayoutInvalidationContext{ 
            	invalidateFlowLayoutDelegateMetrics():number;
            	setInvalidateFlowLayoutDelegateMetrics_(invalidateFlowLayoutDelegateMetrics:number|NativePointer):any;
            	invalidateFlowLayoutAttributes():number;
            	setInvalidateFlowLayoutAttributes_(invalidateFlowLayoutAttributes:number|NativePointer):any;
       }
    }
}