Property and AssignmentProperty have the same type

[yigalirani]

relevant code from acorn.d.ts

export interface AssignmentProperty extends Node {
  type: "Property"
  //deleted for bravity
}

export interface Property extends Node {
  type: "Property"
 //deleted for bravity
}

that makes it diffecullt, maybe impossble, to write a type guard for that

[marijnh]

This kind of falls out of the ESTree design, which we aren't responsible for. In one context, nodes with a Property type have a pattern in their value field, but in another context, when a child of an object pattern, it holds an expression.