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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_pipeline_id(app='', name=''):
 """Get the ID for Pipeline _name_. Args: app (str):
 Name of Spinnaker Application to search. name (str):
 Name of Pipeline to get ID for. Returns: str: ID of specified Pipeline. None: Pipeline or Spinnaker Appliation not found. """

    return_id = None

    pipelines = get_all_pipelines(app=app)

    for pipeline in pipelines:
        LOG.debug('ID of %(name)s: %(id)s', pipeline)

        if pipeline['name'] == name:
            return_id = pipeline['id']
            LOG.info('Pipeline %s found, ID: %s', name, return_id)
            break

    return return_id