Function openxr_sys::enumerate_environment_blend_modes

pub unsafe extern "system" fn enumerate_environment_blend_modes(
    instance: Instance, 
    system_id: SystemId, 
    environment_blend_mode_capacity_input: u32, 
    environment_blend_mode_count_output: *mut u32, 
    environment_blend_modes: *mut EnvironmentBlendMode
) -> Result