code: function all(h, parent) {
    const nodes = parent.children || []
    const { length } = nodes
    const values = []
    let index = -1
  
    while (++index < length) {
      const result = one(h, nodes[index], parent)
      values.push(result)
    }
  
    return values.filter(node => node)
  }
docs: /* Transform the children of `parent`.