## mark a section (Learn more)

if(_verticalPatternImage==nil){ UInt8 bytes[]={ 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x02, 0x08, 0x02, 0x00, 0x00, 0x00, 0xee, 0x03, 0xda, 0x87, 0x00, 0x00, 0x00, 0x09, 0x70, 0x48, 0x59, 0x73, 0x00, 0x00, 0x0b, 0x13, 0x00, 0x00, 0x0b, 0x13, 0x01, 0x00, 0x9a, 0x9c, 0x18, 0x00, 0x00, 0x00, 0x23, 0x49, 0x44, 0x41, 0x54, 0x08, 0x99, 0x63, 0x5c, 0xba, 0x74, 0x69, 0x78, 0x78, 0xf8, 0xbf, 0x7f, 0xff, 0xfe, 0xfe, 0xfd, 0xfb, 0xe7, 0xcf, 0x9f, 0xdf, 0x48, 0xe0, 0xd8, 0xb1, 0x63, 0x4c, 0x0c, 0x78, 0x01, 0x00, 0x9d, 0xdc, 0x19, 0xf3, 0xdb, 0x7c, 0x7c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82 }; NSData* data=[NSData dataWithBytes:bytes length:sizeof(bytes)]; _verticalPatternImage=[[NSImage alloc]initWithData:data]; }

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