code: function removeReference(name, opposite) {
    const ref = this.references[name]
    _.unset(this.references, name)
    if (ref.opposite !== undefined) {
      if (opposite) {
        _.unset(ref.type.references, ref.opposite)
      } else {
        _.unset(ref.type.references[ref.opposite], 'opposite')
      }
    }
  }
docs: Remove a reference from a class
  @method
  @memberof Class~ClassInstance
  @param {string} name - The name of the reference to remove
  @param {boolean} opposite - true if the opposite reference should be removed as well