Multipart.enc.fname: def of bend-kit-multipart@0.3.0.0
Import: import bend-kit-multipart@0.3.0.0/multipart.bend as Multipart
Lines 219-224 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=219&end_line=224

import Base

def enc.fname(m: Maybe<&2, String>) -> String:
  match m:
    case None{}:
      SNil{}
    case Some{f}:
      "; filename=\"" ++ esc(f) ++ "\""

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  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-multipart@0.3.0.0/multipart.bend&name=esc