Explain the following code snippet in detail with examples.

def graphColoring(graph, m, i, color):

# if current index reached end

if (i == 4):

# if coloring is safe

if (isSafe(graph, color)):

# Prthe solution

printSolution(color)

return True

return False

# Assign each color from 1 to m

for j in range(1, m + 1):

color[i] = j

# Recur of the rest vertices

if (graphColoring(graph, m, i + 1, color)):

return True

color[i] = 0

return False