<｜begin▁of▁sentence｜>### Instruction:
Given a graph with nodes A, B, C where A is connected to B and B to C, how do you check if the unary negation operation ('__neg__') is supported by this graph using NetworkX's 'operator_method_registry'?
### Response:
import networkx as nx

# This example will show how to use the 'operator_method_registry' available in NetworkX.
# Although 'operator_method_registry' isn't directly usable as a function or method, it is used by NetworkX to map operators to specific functions.

# Let's illustrate this by creating a networkx graph and using an operator from the registry
g = nx.Graph()
g.add_edge('A', 'B')
g.add_edge('B', 'C')

def check_if_negation_supported(graph):
    """Check if the unary negation operator is supported by the graph."""
    negation_func = nx.operators.operator_method_registry[(-1, graph.__class__)]['__neg__']
    try:
        new_graph = negation_func(graph)
        return True
    except NotImplementedError:
        return False

# Checking if negation is supported
supported = check_if_negation_supported(g)
print('Negation supported:', supported)
<|EOT|>
