parameters: (self, service_descriptor)
docstring: Initializes an instance of the service class builder.
  
      Args:
        service_descriptor: ServiceDescriptor to use when constructing the
          service class.
docstring_summary: Initializes an instance of the service class builder.
docstring_tokens: Initializes an instance of the service class builder .
function: def __init__(self, service_descriptor):
      """Initializes an instance of the service class builder.
  
      Args:
        service_descriptor: ServiceDescriptor to use when constructing the
          service class.
      """
      self.descriptor = service_descriptor
function_tokens: def __init__ ( self , service_descriptor ) : self . descriptor = service_descriptor