如何在Groovy中访问参数的值？这似乎是一个微不足道的问题，但却给我带来了许多小时的痛苦。

dslFactory.job(name) {

            parameters {
                activeChoiceParam('ENTERPRISESERVER') {
                    description('')
                    choiceType('SINGLE_SELECT')
                    groovyScript {
                        script("""[
                            "vws-10-persmft",
                            "vws-10-persmft2",
                            "vws-10-persmft3",
                            // "vws-10-persmfe",
                            // "vws-10-persmfe2",
                            "vts-10-perse9",
                            //"vts-10-perse8",
                            //"vts-10-perse7",
                            "vws-10-perskmt5"
                        ]""")
                    }
                }
            }

            steps {
                def targetServer = '${ENTERPRISESERVER}'
                powerShell """
                    Write-Output 'Target Server: $targetServer'
                    Invoke-Command -ComputerName '$targetServer' -ScriptBlock {
                        Restart-Service -Name 'SEEShutdown';
                        Restart-Service -Name 'SEEMonitor';
                    };
                """
            }
        }

当我运行该代码时，我得到以下错误：

+ ...             Invoke-Command -ComputerName '${ENTERPRISESERVER}' -Scrip ...

因此，出于某种原因，Groovy不解析${ENTERPRISESERVER}。我尝试过使用$ENTERPRISESERVER，但它无法编译：

de.akdb.pers.ci.JobScriptsSpec > test script bootstrap.groovy FAILED
    org.spockframework.runtime.UnallowedExceptionThrownError at JobScriptsSpec.groovy:24
        Caused by: javaposse.jobdsl.dsl.DslScriptException at JobScriptsSpec.groovy:21
            Caused by: groovy.lang.MissingPropertyException at JobScriptsSpec.groovy:21

我做错了什么？
我还尝试了以下问题的解决方案：
Jenkins Job DSL: Using parameters in groovyScript in job step
How to access a specific Jenkins job parameter from within a JobDSL?
How to retrieve Jenkins build parameters using the Groovy API?