HH\Lib\IO\CloseableSeekableWriteHandle
Requires the Hack Standard Library - Experimental Additions to be installed.
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This function is available as IO\CloseableSeekableWriteHandle() in Facebook's www repository.
Interface Synopsis
namespace HH\Lib\IO;
interface CloseableSeekableWriteHandle implements SeekableWriteHandle, CloseableSeekableHandle, CloseableWriteHandle {...}