DEV: extract fetcher method for easier downstream use
DEV: extract fetcher method for easier downstream use

alphaBenj/zipline,magne-max/zipline-ja,enigmampc/catalyst,umuzungu/zipline,umuzungu/zipline,bartosh/zipline,quantopian/zipline,enigmampc/catalyst,alphaBenj/zipline,bartosh/zipline,wilsonkichoi/zipline,wilsonkichoi/zipline,magne-max/zipline-ja,humdings/zipline,quantopian/zipline,humdings/zipline,Scapogo/zipline,florentchandelier/zipline,Scapogo/zipline,florentchandelier/zipline