def get_pushes(self, repository_id, project=None, skip=None, top=None, search_criteria=None):
        """GetPushes.
        [Preview API] Retrieves pushes associated with the specified repository.
        :param str repository_id: The name or ID of the repository.
        :param str project: Project ID or project name
        :param int skip: Number of pushes to skip.
        :param int top: Number of pushes to return.
        :param :class:`<GitPushSearchCriteria> <azure.devops.v5_1.git.models.GitPushSearchCriteria>` search_criteria: Search criteria attributes: fromDate, toDate, pusherId, refName, includeRefUpdates or includeLinks. fromDate: Start date to search from. toDate: End date to search to. pusherId: Identity of the person who submitted the push. refName: Branch name to consider. includeRefUpdates: If true, include the list of refs that were updated by the push. includeLinks: Whether to include the _links field on the shallow references.
        :rtype: [GitPush]
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if repository_id is not None:
            route_values['repositoryId'] = self._serialize.url('repository_id', repository_id, 'str')
        query_parameters = {}
        if skip is not None:
            query_parameters['$skip'] = self._serialize.query('skip', skip, 'int')
        if top is not None:
            query_parameters['$top'] = self._serialize.query('top', top, 'int')
        if search_criteria is not None:
            if search_criteria.from_date is not None:
                query_parameters['searchCriteria.fromDate'] = search_criteria.from_date
            if search_criteria.to_date is not None:
                query_parameters['searchCriteria.toDate'] = search_criteria.to_date
            if search_criteria.pusher_id is not None:
                query_parameters['searchCriteria.pusherId'] = search_criteria.pusher_id
            if search_criteria.ref_name is not None:
                query_parameters['searchCriteria.refName'] = search_criteria.ref_name
            if search_criteria.include_ref_updates is not None:
                query_parameters['searchCriteria.includeRefUpdates'] = search_criteria.include_ref_updates
            if search_criteria.include_links is not None:
                query_parameters['searchCriteria.includeLinks'] = search_criteria.include_links
        response = self._send(http_method='GET',
                              location_id='ea98d07b-3c87-4971-8ede-a613694ffb55',
                              version='5.1-preview.2',
                              route_values=route_values,
                              query_parameters=query_parameters)
        return self._deserialize('[GitPush]', self._unwrap_collection(response))
GetPushes.
        [Preview API] Retrieves pushes associated with the specified repository.
        :param str repository_id: The name or ID of the repository.
        :param str project: Project ID or project name
        :param int skip: Number of pushes to skip.
        :param int top: Number of pushes to return.
        :param :class:`<GitPushSearchCriteria> <azure.devops.v5_1.git.models.GitPushSearchCriteria>` search_criteria: Search criteria attributes: fromDate, toDate, pusherId, refName, includeRefUpdates or includeLinks. fromDate: Start date to search from. toDate: End date to search to. pusherId: Identity of the person who submitted the push. refName: Branch name to consider. includeRefUpdates: If true, include the list of refs that were updated by the push. includeLinks: Whether to include the _links field on the shallow references.
        :rtype: [GitPush]