THPDFHeadlessTextAppearance.DetachObject
function DetachObject(Index: Integer): THPDFObject;Transfer ownership of slot zero through six to the caller and clear that slot; free or register the returned object using its corresponding indirect number, preserving all seven generated reference relationships
Repeating the call for the same slot returns nil; an out-of-range index raises ERangeError
Ownership and support contract · Document appearance filling