Firebase. Storage. DownloadState
  DownloadState contains information for a download in progress.
Summary
It is sent to a StorageProgress handler during the operation.
        Properties | 
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        BytesTransferred
       | 
      
        long
        The total number of bytes downloaded so far.  
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        Reference
       | 
      
        
         Returns the StorageReference associated with this download.  
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        TotalByteCount
       | 
      
        long
        The total number of bytes to download.  
       | 
    
Properties
BytesTransferred
long BytesTransferred
The total number of bytes downloaded so far.
| Details | |
|---|---|
| Returns | 
               the total number of bytes downloaded so far. 
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Reference
StorageReference Reference
Returns the StorageReference associated with this download.
| Details | |
|---|---|
| Returns | 
               the StorageReference associated with this download. 
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TotalByteCount
long TotalByteCount
The total number of bytes to download.
| Details | |
|---|---|
| Returns | 
               The total number of bytes to download or -1 if the size is unknown. 
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