code: @DoesServiceRequest
      public final FileInputStream openRead(final AccessCondition accessCondition, FileRequestOptions options,
              OperationContext opContext) throws StorageException {
          if (opContext == null) {
              opContext = new OperationContext();
          }
  
          options = FileRequestOptions.populateAndApplyDefaults(options, this.fileServiceClient, false /* setStartTime */);
  
          return new FileInputStream(this, accessCondition, options, opContext);
      }
docs: Opens a file input stream to download the file using the specified request options and
  operation context.
  <p>
  Use {@link #setStreamMinimumReadSizeInBytes(int)} to configure the read size.
  
  @param accessCondition
  An {@link AccessCondition} object that represents the access conditions for the file.
  @param options
  A {@link FileRequestOptions} object that specifies any additional options for the request. Specifying
  <code>null</code> will use the default request options from the associated service client (
  {@link CloudFileClient}).
  @param opContext
  An {@link OperationContext} object that represents the context for the current operation. This object
  is used to track requests to the storage service, and to provide additional runtime information about
  the operation.
  
  @return An <code>InputStream</code> object that represents the stream to use for reading from the file.
  
  @throws StorageException
  If a storage service error occurred.