nghttp2_session_callbacks_set_before_frame_send_callback
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Synopsis
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*#include <nghttp2/nghttp2.h>*

.. function:: void nghttp2_session_callbacks_set_before_frame_send_callback( nghttp2_session_callbacks *cbs, nghttp2_before_frame_send_callback before_frame_send_callback)

    
    Sets callback function invoked before a non-DATA frame is sent.