Protocol.hdr_all.of: def of bendonnect-rpc@0.1.0.0
Import: import bendonnect-rpc@0.1.0.0/src/protocol.bend as Protocol
Lines 143-149 of bendonnect-rpc@0.1.0.0/src/protocol.bend: https://jend.leeeet.dev/read.txt?path=bendonnect-rpc@0.1.0.0/src/protocol.bend&start_line=143&end_line=149

import Base

def hdr_all.of(r: Map<&2, List<&2, String>> & List<&2, String>) -> Maybe<&2, String>:
  (m, v) = r
  match v:
    case Nil{}:
      None{}
    case Con{x, rest}:
      Some{String.join(Con{x, rest}, ",")}

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Map
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.join