<｜begin▁of▁sentence｜>### Instruction:
Suppose you have an igraph Graph object representing an Erdős-Rényi graph with 10 vertices and 15 edges, and you've set up the visual style for plotting the graph. You have an instance of AbstractCairoVertexDrawer that needs to draw individual vertices on the plot. How would you use the draw method from AbstractCairoVertexDrawer to draw the first vertex of your graph in Python?
### Response:
from igraph import Graph
import igraph as ig
g = ig.Graph.Erdos_Renyi(n=10, m=15)
layout = g.layout('kk')
visual_style = {}
visual_style['vertex_size'] = 20
visual_style['layout'] = layout
visual_style['bbox'] = (300, 300)
visual_style['margin'] = 20

# Assuming `drawer` is an instance of AbstractCairoVertexDrawer, we will draw vertex 0
drawer = ig.drawing.vertex.AbstractCairoVertexDrawer(None)
drawer.context = ig.plot(g, **visual_style).cairo
# Draw the first vertex (index 0)
drawer.draw(g.vs[0])
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