pub type PFN_vkCmdSetCoverageModulationModeNV = unsafe extern "system" fn(_command_buffer: CommandBuffer, _coverage_modulation_mode: CoverageModulationModeNV);pub type PFN_vkCmdSetCoverageModulationModeNV = unsafe extern "system" fn(_command_buffer: CommandBuffer, _coverage_modulation_mode: CoverageModulationModeNV);