Add _add_barrier_safe_constraint function. #20

	# This workflow will run unit test.

	name: unit test

	on:
	push:
	branches: ["main"]
	pull_request:
	branches: ["main"]

	permissions:
	contents: read

	jobs:
	build:
	runs-on: self-hosted

	steps:
	- uses: actions/checkout@v4
	- name: Linting
	run: flake8 ./
	- name: unit test
	run: pytest tests
	- name: run linear_toy_demo
	run: python examples/linear_toy/linear_toy_demo.py

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