add IsVisible field / interface method #200

	name: Build
	on: [push]
	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Setup
	uses: actions/setup-go@v1
	with:
	go-version: 1.18
	id: go
	- name: Checkout
	uses: actions/checkout@v2
	with:
	lfs: true
	- name: Build
	run: \|
	go generate ./...
	go build .
	- name: Test
	run: \|
	go test -v -race -coverprofile=coverage.txt -covermode=atomic -coverpkg=./... ./...
	go vet
	- name: Upload Coverage
	uses: codecov/codecov-action@v1

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