Function hipGraphExecGetFlags 

pub unsafe extern "C" fn hipGraphExecGetFlags(
    graphExec: hipGraphExec_t,
    flags: *mut c_ulonglong,
) -> hipError_t

@brief Return the flags of an executable graph.

@param [in] graphExec - Executable graph to get the flags from. @param [out] flags - Flags used to instantiate this executable graph. @returns #hipSuccess, #hipErrorInvalidValue.