out_ini_sizeOptional BigUint64Array[0] output receiving the serialized byte length, excluding the NUL terminator. Pass BigUint64Array storage, not a JS scalar; native access uses the supplied backing memory.
Serialized ImGui settings copied to a JS string; out_ini_size optionally receives the UTF-8 byte length.
Return INI data copied to a JS string without the native terminating NUL. Save the returned text using your own storage.
If WantSaveIniSettings is set on the IO field view from ImGui.viewImGuiIO(ioHandle), save the data and clear that flag. This binding does not expose the native configuration needed to disable automatic file saving and use that workflow.
Serialize interface settings as INI text.