Panel:Add
Example
Create a Panel with vgui.Register, and initialize a DScrollPanel with Panel:Add
When provided with a string or table, this function will create a new vgui element with that name and set the parent to the panel that this method is called on. When provided with a panel it will use Panel:SetParent on the provided panel to set it to our source panel
Create a Panel with vgui.Register, and initialize a DScrollPanel with Panel:Add