microsoft-azure-storage/src/com/microsoft/azure/storage/file/CloudFile.java
@DoesServiceRequest
    public final void downloadRange(final long offset, final Long length, final OutputStream outStream)
            throws StorageException {
        this.downloadRange(offset, length, outStream, null /* accessCondition */, null /* options */, null /* opContext */);
    }
@DoesServiceRequest
    public final void downloadRange(final long offset, final Long length, final OutputStream outStream)
            throws StorageException {
        this.downloadRange(offset, length, outStream, null /* accessCondition */, null /* options */, null /* opContext */);
    }
Downloads the contents of a file to a stream.

@param offset
A <code>long</code> which represents the offset to use as the starting point for the source.
@param length
A <code>Long</code> which represents the number of bytes to read or <code>null</code>.
@param outStream
An <code>{@link OutputStream}</code> object that represents the target stream.
@throws StorageException
If a storage service error occurred.