code: function initializeNode (node) {
    if (!node || node.length === 0) {
      return 0
    }
    const tag = node.get(0).name
    if (nodeTypes.mostPositive.indexOf(tag) >= 0) {
      return 5 + getClassWeight(node)
    }
    if (nodeTypes.positive.indexOf(tag) >= 0) {
      return 3 + getClassWeight(node)
    }
    if (nodeTypes.negative.indexOf(tag) >= 0) {
      return -3 + getClassWeight(node)
    }
    if (nodeTypes.mostNegative.indexOf(tag) >= 0) {
      return -5 + getClassWeight(node)
    }
    return -1
  }
docs: Check the type of node, and get its Weight