push(format, capture) {
    this._formatComponents = this._formatComponents.concat(toArray(format))
    this.capture = this.capture.concat(toArray(capture))
    // Return `this` for chaining.
    return this
  }
Saves the format and capture values in the RouteBuilder instance.

@param {string} format - Pattern based on path-to-regex, for example: (?:(.+)\\.)?${serviceBaseUrl}
@param {string} capture - Value to capture
@returns {object} RouteBuilder instance for chaining