Show Signature of Current Parameter

[Blake-John]

Hey, I think this plugin is a nice plugin that impoves my effiency well and thanks all the contributors for their hard work.
But I still think there is something can be enhanced. Could you please add a mode to show the signature of the current parameters when typing, just like the vscode does.
Since when I writing the function with a long long list of parameters and a detailed doc, I couldn't see the description of what I'm going to type, like

Thanks for your reading !