1221     Use the command :hg:`update` to switch to an existing branch.

  1221     Use the command :hg:`update` to switch to an existing branch.

  1222 

  1222 

  1223     Returns 0.

  1223     Returns 0.

  1224     """

  1224     """

  1225 

  1225 

  1226     fm = ui.formatter('branches', opts)

  1227     fm = ui.formatter('branches', opts)

  1227     hexfunc = fm.hexfunc

  1228     hexfunc = fm.hexfunc

  1228 

  1229 

  1229     allheads = set(repo.heads())

  1230     allheads = set(repo.heads())

  1230     branches = []

  1231     branches = []