code: def get_available_sources(cls):
          
          if SHConfig().is_eocloud_ogc_url():
              return [cls.SENTINEL2_L1C, cls.SENTINEL2_L2A, cls.SENTINEL2_L3B, cls.SENTINEL1_IW, cls.SENTINEL1_EW,
                      cls.SENTINEL1_EW_SH, cls.SENTINEL3, cls.SENTINEL5P, cls.LANDSAT5, cls.LANDSAT7, cls.LANDSAT8,
                      cls.LANDSAT8_L2A, cls.ENVISAT_MERIS]
          return [cls.SENTINEL2_L1C, cls.SENTINEL2_L2A, cls.SENTINEL1_IW, cls.SENTINEL1_EW, cls.SENTINEL1_EW_SH, cls.DEM,
                  cls.MODIS, cls.LANDSAT8]
docs: Returns which data sources are available for configured Sentinel Hub OGC URL
  
          :return: List of available data sources
          :rtype: list(sentinelhub.DataSource)