init with existing API object

[PeiSong]

can add a param to the builder constructor?

export class OpenApiBuilder {
    rootDoc: oa.OpenAPIObject;

    static create(doc?: oa.OpenAPIObject): OpenApiBuilder {
        return new OpenApiBuilder();
    }

    constructor(doc?: oa.OpenAPIObject) {
        this.rootDoc = doc || {
        ......

[Pedro J. Molina]

Good idea @naivefun ! Added and published on v. 1.0.2