How to use the @tslab/typescript-for-tslab.createPrinter function in @tslab/typescript-for-tslab

return;
          }
          decls.push(decl);
        });
        stmt.declarationList.declarations = ts.createNodeArray(decls);
      }
      if (ts.isImportDeclaration(stmt)) {
        keepNamesInImport(stmt, names);
      }
      // Do nothing for
      // - TypeAliasDeclaration (No multiple specs)
      // - FunctionDeclaration (ditto)
      // - InterfaceDeclaration (ditto)
    });
    declsSF.statements = ts.createNodeArray(statements);
    let printer = ts.createPrinter();
    let anyVarsDecls: string[] = [];
    anyVars.forEach(name => {
      anyVarsDecls.push(`let ${name}: any;\n`);
    });
    return printer.printFile(declsSF) + anyVarsDecls.join("");
  }

it("keep default import", () => {
    const src = ts.createSourceFile(
      "src.ts",
      'import mydefault, {foo, bar as baz} from "mylib";',
      ts.ScriptTarget.ES2019
    );
    const stmt = src.statements[0];
    if (!ts.isImportDeclaration(stmt)) {
      fail("stmt is not isImportDeclaration");
      return;
    }
    const names = new Set(["mydefault"]);
    converter.keepNamesInImport(stmt, names as Set);
    let printer = ts.createPrinter();
    expect(printer.printFile(src)).toEqual('import mydefault from "mylib";\n');
  });