GetProjectCollection.
        [Preview API] Get project collection with the specified id or name.
        :param str collection_id:
        :rtype: :class:`<TeamProjectCollection> <azure.devops.v5_1.core.models.TeamProjectCollection>`

def get_project_collection(self, collection_id):
        """GetProjectCollection.
        [Preview API] Get project collection with the specified id or name.
        :param str collection_id:
        :rtype: :class:`<TeamProjectCollection> <azure.devops.v5_1.core.models.TeamProjectCollection>`
        """
        route_values = {}
        if collection_id is not None:
            route_values['collectionId'] = self._serialize.url('collection_id', collection_id, 'str')
        response = self._send(http_method='GET',
                              location_id='8031090f-ef1d-4af6-85fc-698cd75d42bf',
                              version='5.1-preview.2',
                              route_values=route_values)
        return self._deserialize('TeamProjectCollection', response)