Some representation types (label) specifically set their parameters like 'linewidth' to null (e.g here) . If you try to setParameters({linewidth: 1.5}) this would attempt to access attributes on null in the Representation setParameters method here.
This one char fix avoids throwing an error (though obviously setting linewidth:1.5 on a label representation is meaningless anyway, but unhandled exceptions are bad).
Some representation types (label) specifically set their parameters like 'linewidth' to null (e.g here) . If you try to setParameters({linewidth: 1.5}) this would attempt to access attributes on null in the Representation
setParametersmethod here.This one char fix avoids throwing an error (though obviously setting linewidth:1.5 on a label representation is meaningless anyway, but unhandled exceptions are bad).