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PlotLegend & Tick marks in MultipleListPlot


I'm having some trouble extracting tick marks from MultipleListPlot
when I also have a PlotLegend.  For example, if I have no legend, I can
extract tick marks using something like:

pl1=MultipleListPlot[dataList];
ticks = FrameTicks /. AbsoluteOptions[pl1];

When I add the option PlotLegend to MultipleListPlot, the FrameTicks
option returns {{},{}}, but Ticks is populated.  However, the tick
positions seem to be in relative coordinates instead of the data
coordinates.

So I have two questions:
1. Is there some known way to convert between the relative coordinates
and data coordinates?
2. If not, is there a way of (temporarily) dropping a given argument
from a sequence of arguments in a module?  For example, suppose I use a
module of the form:

someMod[f_List, opts___?OptionQ]:=Module[{...},(body to manipulate
plot)]

Is there some way to remove the PlotLegend option (if it exists) from
the sequence contained in opts?


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