code: def convert_type(self, type):
          
  
          # Mapping
          mapping = {
              'any': 'STRING',
              'array': None,
              'boolean': 'BOOLEAN',
              'date': 'DATE',
              'datetime': 'DATETIME',
              'duration': None,
              'geojson': None,
              'geopoint': None,
              'integer': 'INTEGER',
              'number': 'FLOAT',
              'object': None,
              'string': 'STRING',
              'time': 'TIME',
              'year': 'INTEGER',
              'yearmonth': None,
          }
  
          # Not supported type
          if type not in mapping:
              message = 'Type %s is not supported' % type
              raise tableschema.exceptions.StorageError(message)
  
          return mapping[type]
docs: Convert type to BigQuery