lm.Parallelogram
Quadrilateral with independent top/bottom widths and x offsets.
lm.Parallelogram(top_width: 'float', bot_width: 'float', y_dim: 'float', layer: 'LayerSpec', top_x_offset: 'float' = 0, bot_x_offset: 'float' = 0, centered: 'bool' = True) -> 'Polygon'