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        In the table below, a denotes an asynchronous write stream object,
        o denotes an offset of type boost::uint64_t, cb
        denotes an object satisfying constant
        buffer sequence requirements, and h denotes an object
        satisfying write handler
        requirements.
      
Table 3. Buffer-oriented asynchronous random-access write device requirements
| operation | type | semantics, pre/post-conditions | 
|---|---|---|
| 
                   | A type satisfying the Executor requirements. | Returns the associated I/O executor. | 
| 
                   | 
                   | 
                  Initiates an asynchronous operation to write one or more bytes
                  of data to the device  |