client.mjs:
  import "fs";
    [A]:
      parentResolve()
        [B]:
          parentResolve()
            [native]:
              'fs' -> 'node:fs'
          'fs' -> $BWRAP = 'data:import "node:fs";'
      'fs' -> $AWRAP = 'data:import "$BWRAP";'

$AWRAP:
  import "$BWRAP";
    [A]:
      identifies itself, skips all mapping
      "$BWRAP" -> "$BWRAP"

$BWRAP:
  import "node:fs"
    [A]:
      parentResolve()
        [B]:
          identifies itself, skips all mapping
          "node:fs" -> "node:fs"
      'node:fs' -> $AREWRAP = 'data:import "node:fs";'

$AREWRAP:
  import "node:fs";
    [A]:
      identifies itself, skips all mapping
      'node:fs' -> 'node:fs'