Function enumerate_instance_layer_properties 

pub fn enumerate_instance_layer_properties(
    entry: &Entry,
) -> Result<Vec<LayerProperties>, CallError>

Enumerate all implicit and explicit Vulkan layers installed on this system.

Errors

Returns CallError::MissingCommand if the command is absent or CallError::Vulkan on a driver failure.

Khronos reference: vkEnumerateInstanceLayerProperties