Function gst_ context_ get_ vulkan_ instance 
Source pub unsafe extern "C" fn gst_context_get_vulkan_instance(
    context: *mut GstContext,
    instance: *mut *mut GstVulkanInstance,
) -> gbooleanpub unsafe extern "C" fn gst_context_get_vulkan_instance(
    context: *mut GstContext,
    instance: *mut *mut GstVulkanInstance,
) -> gboolean