def METHOD_NAME(
        self, spec, region, weight_scales, app_vertex, vertex_slice,
        synaptic_matrices):
    """
    Write structural plasticity parameters.
    :param ~data_specification.DataSpecificationGenerator spec:
        The data specification to write to
    :param int region: region ID
    :param list(float) weight_scales: Weight scaling for each synapse type
    :param ~pacman.model.graphs.application.ApplicationVertex app_vertex:
        The target application vertex
    :param ~pacman.model.graphs.common.Slice vertex_slice:
        The slice of the target vertex to generate for
    :param SynapticMatrices synaptic_matrices:
        The synaptic matrices for this vertex
    """