def METHOD_NAME(self, context):
    self.inputs.new('SvStringsSocket', "X").prop_name = 'x_'
    self.inputs.new('SvStringsSocket', "Y").prop_name = 'y_'
    self.inputs.new('SvStringsSocket', "Z").prop_name = 'z_'
    self.width = 100
    self.outputs.new('SvVerticesSocket', "Vectors")