png = ( id, parentId, screenshotTitle, options = {} ) => {
        const FILENAME_RE = /[^a-zA-Z\d\-\_]/g,
              normalizedTitle = screenshotTitle.replace( FILENAME_RE, "-" ),
              normalizedSuiteTitle = SUITE_NAME.replace( FILENAME_RE, "-" ),
              fileName = `${ id }.${ normalizedTitle }.png`,
              path = join( PATH_SCREENSHOTS, normalizedSuiteTitle,
                parentId !== null ? parentId + "." + fileName : fileName );
        shell.mkdir( "-p" , dirname( path ) );
        return { path, ...options };
      }
@see https://pptr.dev/#?product=Puppeteer&version=v1.5.0&show=api-class-page
@param {string} id
@param {string} parentId
@param {string} screenshotTitle
@param {Object} [options]
@returns {Object}