title: Jenkins Pipeline Groovy: Read default parameter value from another job?
body: <p>Within the Groovy code for a pipeline job which manages multiple jobs, is it possible to read the default value of a parameter defined in the configuration of another job?</p>
  
  <p>That is, within pipeline job A, I want to read the default value of param P in job B, which hasn't been scheduled yet.  (This will affect how the request to build B is constructed in job A.)</p>
  
  <pre><code>def val = "some-random-prefix" +
            ReadJobParamDefault(job: 'B', parameter: 'paramName') +
            "-some-random-suffix"
  def b = build(job: 'B',
                description: 'Some text',
                parameters: [[$class: 'StringParameterValue',
                              name: 'paramName',
                              value: val]])
  </code></pre>
  
  <p>Is there something real for ReadJobParamDefault?</p>