Function handle_json_input 

pub fn handle_json_input(
    raw_code: String,
    map_eval: &MapEvalConfig,
) -> Result<Plot>

Plot does not implement Deserialize, so this routine is only an unofficial best-effort translation.

Do not be surprised if the output of Plot::serialize cannot be round-tripped through this function.

In addition, fields that cannot be translated are silently dropped.