An injunction shall not be granted:

1. 1. To stay a judicial proceeding pending at the commencement of the action in which the injunction is demanded, unless the restraint is necessary to prevent a multiplicity of such proceedings.
2. 2. To stay proceedings in a court of the United States.
3. 3. To stay proceedings in another state upon a judgment of a court of that state.
4. 4. To prevent enforcement of a public statute by officers of the law for the public benefit.
5. 5. To prevent breach of a contract, the performance of which would not be specifically enforced.
6. 6. To prevent the exercise of a public or private office in a lawful manner by the person in possession.
7. 7. To prevent a legislative act by a municipal corporation.