Trait ExtShaderDemoteToHelperInvocationExtension
vulkanalia::vk
pub trait ExtShaderDemoteToHelperInvocationExtension: DeviceV1_0 { }
https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/VK_EXT_shader_demote_to_helper_invocation.html
impl ExtShaderDemoteToHelperInvocationExtension for Device