C++
bool isFromOverlayReference() const;
Description
Returns true if this block table record is an overlaid xref. Otherwise, if isFromExternalReference() returns Adesk::kTrue, the block table record is an attached xref.
The isFromOverlayReference value is used for the fourth bit in DXF group code 70 (the bit is set if isFromOverlayReference() returns Adesk::kTrue).