class Solargraph::LanguageServer::Message::TextDocument::SignatureHelp

def process
  line = params['position']['line']
  col = params['position']['character']
  suggestions = host.signatures_at(params['textDocument']['uri'], line, col)
  set_result({
    signatures: suggestions.flat_map { |pin| pin.signature_help }
  })
rescue FileNotFoundError => e
  Logging.logger.warn "[#{e.class}] #{e.message}"
  Logging.logger.warn e.backtrace.join("\n")
  set_result nil
end