How to use the @argdown/core.ArgdownTypes.STATEMENT_MAP_NODE function in @argdown/core

},
      process: [
        "parse-input",
        "build-model",
        "build-map",
        "colorize",
        "find-element-at-position"
      ],
      throwExceptions: true
    };
    const response = await argdown.runAsync(request);
    if (response.elementAtPosition) {
      const title = response.elementAtPosition.title;
      let nodeType = ArgdownTypes.ARGUMENT_MAP_NODE;
      if (response.elementAtPosition.type === ArgdownTypes.EQUIVALENCE_CLASS) {
        nodeType = ArgdownTypes.STATEMENT_MAP_NODE;
      }
      const node = this.findNodeInMapNodeTree(
        response.map!.nodes,
        n => n.title === title && n.type === nodeType
      );
      if (!node) {
        return "";
      }
      return node.id || "";
    }
    return "";
  }
  public async getRangeOfHeading(

const node = this.findNodeInMapNodeTree(
      response.map!.nodes,
      (n: any) => n.id === id
    );
    if (node && node.type === ArgdownTypes.ARGUMENT_MAP_NODE) {
      const argument = response.arguments![node.title!];
      const desc = IArgument.getCanonicalMember(argument);
      if (desc) {
        return new vscode.Range(
          (desc.startLine || 1) - 1,
          (desc.startColumn || 1) - 1,
          (desc.endLine || 1) - 1,
          desc.endColumn || 1
        );
      }
    } else if (node && node.type === ArgdownTypes.STATEMENT_MAP_NODE) {
      const eqClass = response.statements![node.title!];
      const statement = IEquivalenceClass.getCanonicalMember(eqClass);
      if (statement) {
        return new vscode.Range(
          (statement.startLine || 1) - 1,
          (statement.startColumn || 1) - 1,
          (statement.endLine || 1) - 1,
          statement.endColumn || 1
        );
      }
    }
    return new vscode.Range(0, 0, 0, 0);
  }
  private findNodeInMapNodeTree(