compiling error

[Boltzmachine]

error[E0308]: mismatched types
   --> render/src/fontentry.rs:144:57
    |
144 |                     if let Some(transcoder) = source.to(dest) {
    |                                                      -- ^^^^ expected `pdf_encoding::Encoding`, found a different `pdf_encoding::Encoding`
    |                                                      |
    |                                                      arguments to this method are incorrect
    |
    = note: `pdf_encoding::Encoding` and `pdf_encoding::Encoding` have similar names, but are actually distinct types
    ````