def METHOD_NAME(self, context):
    s = self.inputs.new('SvVerticesSocket', 'Base')
    s.use_prop = True
    s.custom_draw = 'draw_base_sock'
    self.inputs.new('SvVerticesSocket', 'Move mesh').custom_draw = 'draw_move_sock'
    self.outputs.new('SvVerticesSocket', 'Verts')
    self.outputs.new('SvVerticesSocket', "Move vector")