Using if conditionals under stages in DSL pipeline

[Paras Pandey]

I want to call a function under my pipeline , the function name is CMList and the arguments eList and pLists  are in the format of email address .

def eList ="${emailAddress}" def pLists = "${POEmailList}"


Below are the choice parameter added , so that the entries appear in the Jenkins UI and value needs to be input for both
eList and pLists .

properties([  parameters([    text(description: 'Provide Email Address of the  PO ', name: 'POEmailList'),    text(description: 'Provide Email Address of the people to be notified', name: 'emailAddress'),    ]) ])


Below snippet describes the function call:

node(windowsNode) { nslookup() CMList() // Calling CMList function under `windowsnode`. }

The function CMList is defined as below:

void CMList(String eList,String pLists)  stage('Generate Email List To Be Notified') {      if(!((currentBuild.currentresult).contains('UNSTABLE'))){          eList = eList + ";" + pLists      }      echo 'Notify to users - '+ eList  }
 
I want to create a function as  CMList that consists of a stage in groovy . But this function throws the error as
'No such DSL method 'createEmailList' found among steps [ArtifactoryGradleBuild, MavenDescriptorStep, addBadge'....