Split a few helper functions out in parse.js.
Split a few helper functions out in parse.js.

alangpierce/decaffeinate,lunks/decaffeinate,alangpierce/decaffeinate,greyhwndz/decaffeinate,eventualbuddha/decaffeinate,lunks/decaffeinate,edi9999/decaffeinate,netei/decaffeinate,blai/decaffeinate,decaffeinate/decaffeinate,goatslacker/decaffeinate,eventualbuddha/decaffeinate,alangpierce/decaffeinate,decaffeinate/decaffeinate,netei/decaffeinate