Function codespan_lsp::make_lsp_diagnostic

pub fn make_lsp_diagnostic<F>(
    code_map: &CodeMap, 
    diagnostic: Diagnostic, 
    codespan_name_to_file: F
) -> Result<Diagnostic, Error> where
    F: FnMut(&FileName) -> Result<Url, ()>, 

Translates a codespan_reporting::Diagnostic to a languageserver_types::Diagnostic.

Since the language client requires Urls to locate the errors codespan_name_to_file is necessary to resolve codespan FileNames

code and source are left empty by this function