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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_span_name(servicer_context):
 """Generates a span name based off of the gRPC server rpc_request_info"""

    method_name = servicer_context._rpc_event.call_details.method[1:]
    if isinstance(method_name, bytes):
        method_name = method_name.decode('utf-8')
    method_name = method_name.replace('/', '.')
    return '{}.{}'.format(RECV_PREFIX, method_name)