error: unreachable call
   --> src/builder.rs:317:14
    |
317 |             .with_exporter({
    |              ^^^^^^^^^^^^^ unreachable call
...
324 |                 return exporter.with_http_client(reqwest::Client::new());
    |                 -------------------------------------------------------- any code following this expression is unreachable
    |
note: the lint level is defined here
   --> src/lib.rs:1:9
    |
1   | #![deny(warnings)]
    |         ^^^^^^^^
    = note: `#[deny(unreachable_code)]` implied by `#[deny(warnings)]`

error[E0308]: mismatched types
   --> src/builder.rs:324:24
    |
324 |                 return exporter.with_http_client(reqwest::Client::new());
    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Result<Tracer, Error>`, found `HttpExporterBuilder`
    |
    = note: expected enum `std::result::Result<opentelemetry::sdk::trace::Tracer, error::Error>`
             found struct `opentelemetry_otlp::HttpExporterBuilder`