get outgoingRelations() {
    if (!this._outgoingRelations) {
      this._outgoingRelations = this.findOutgoingRelationsInParseTree().map(
        (outgoingRelation) => this._vivifyRelation(outgoingRelation)
      );
    }
    return this._outgoingRelations;
  }
Get/set the outgoing relations of the asset.

@type {Relation[]}