function Deno.readAll
          
readAll(r: Reader): Promise<Uint8Array> 
      Deprecated
This will be removed in Deno 2.0. See the Deno 1.x to 2.x Migration Guide for migration instructions.
Read Reader r until EOF (null) and resolve to the content as
Uint8Array`.
r: Reader
      
    Promise<Uint8Array>