# Get a `MVisibility` from its string representation.
	private fun to_visibility(vis: String): MVisibility do
		if vis == intrude_visibility.to_s then
			return intrude_visibility
		else if vis == public_visibility.to_s then
			return public_visibility
		else if vis == protected_visibility.to_s then
			return protected_visibility
		else if vis == private_visibility.to_s then
			return private_visibility
		else if vis == package_visibility.to_s then
			return package_visibility
		else
			return none_visibility
		end
	end