All of loon's displays have plot states. Plot states specify
what is displayed, how it is displayed and if and how the plot is linked
with other loon plots. Layers, glyphs, navigators and contexts have states
too (also refered to as plot states). This function queries a single plot
state.
Usage
l_cget(target, state)
Arguments
target
either an object of class loon or a vector that specifies the
widget, layer, glyph, navigator or context completely. The widget is
specified by the widget path name (e.g. '.l0.plot'), the remaining
objects by their ids.