Multipart.encode.if: def of bend-kit-multipart@0.3.0.0
Import: import bend-kit-multipart@0.3.0.0/multipart.bend as Multipart
Lines 283-288 of bend-kit-multipart@0.3.0.0/multipart.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&start_line=283&end_line=288

import Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes

def encode.if(ok: Bool, +b: String, parts: List<&1, Part>) -> Result<&1, &1, String, Bytes.Bytes>:
  match ok:
    case False{}:
      Fail{"multipart: boundary must be 1 to 70 RFC 2046 bchars, not ending in a space"}
    case True{}:
      enc.go(parts, b, "\r\n--" ++ b, Done{Nil{}})

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.append
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=Part
  https://jend.leeeet.dev/definition.txt?path=bend-kit-multipart@0.3.0.0/multipart.bend&name=enc.go