CreateCommitStatus.
        [Preview API] Create Git commit status.
        :param :class:`<GitStatus> <azure.devops.v5_1.git.models.GitStatus>` git_commit_status_to_create: Git commit status object to create.
        :param str commit_id: ID of the Git commit.
        :param str repository_id: ID of the repository.
        :param str project: Project ID or project name
        :rtype: :class:`<GitStatus> <azure.devops.v5_1.git.models.GitStatus>`

def create_commit_status(self, git_commit_status_to_create, commit_id, repository_id, project=None):
        """CreateCommitStatus.
        [Preview API] Create Git commit status.
        :param :class:`<GitStatus> <azure.devops.v5_1.git.models.GitStatus>` git_commit_status_to_create: Git commit status object to create.
        :param str commit_id: ID of the Git commit.
        :param str repository_id: ID of the repository.
        :param str project: Project ID or project name
        :rtype: :class:`<GitStatus> <azure.devops.v5_1.git.models.GitStatus>`
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if commit_id is not None:
            route_values['commitId'] = self._serialize.url('commit_id', commit_id, 'str')
        if repository_id is not None:
            route_values['repositoryId'] = self._serialize.url('repository_id', repository_id, 'str')
        content = self._serialize.body(git_commit_status_to_create, 'GitStatus')
        response = self._send(http_method='POST',
                              location_id='428dd4fb-fda5-4722-af02-9313b80305da',
                              version='5.1-preview.1',
                              route_values=route_values,
                              content=content)
        return self._deserialize('GitStatus', response)