Function getNumSnippets

hi_scripting/scripting/ScriptProcessorModules.h:241–241

	SnippetDocument *getSnippet(int c) override;
	const SnippetDocument *getSnippet(int c) const override;
	int getNumSnippets() const override { return numCallbacks; }
	void registerApiClasses() override;
	
	int getControlCallbackIndex() const override { return (int)Callback::onControl; };