def size(self):
        return self.template.size()
converts the given position in space to a cell index
dataset/ETHPy150Open nucleic/enaml/enaml/core/compiler_nodes.py/TemplateInstanceNode.size--crossover with--dataset/ETHPy150Open eoyilmaz/anima/anima/env/mayaEnv/auxiliary.py/Grid.to_index