What I want to do is similar to the "Duplicate Continue" plugin, but
instead of duplicating the entire frame, only the current layer would
be duplicated and added to the layer stack of the following frame, and
a new frame would not be created. What I tried was to switch out
gap_lib_image_file_copy with gap_layer_copy_to_image but I don't know
how to get the current layer as the source layer.
I hope that's clear, and thank you for your response.
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