Hide custom field when issue in certain status

[oks]

Hello,

Can somebody help me with this. I need to hide custom filed type (html) when issue arrives in certain status.

I'm trying to do that with Behaviors plugin as following 

import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.ComponentManager;
import com.atlassian.jira.issue.CustomFieldManager;
import com.atlassian.jira.issue.fields.CustomField;
import com.atlassian.jira.issue.IssueManager;
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.user.ApplicationUser
import com.onresolve.jira.groovy.user.FieldBehaviours

ApplicationUser currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser();

def issueManager = ComponentAccessor.getIssueManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def cField = getFieldById("customfield_12345")

if (Issue.getStatus() == "TOTO"){
cField.setHidden(true)

}

else {

cField.setHidden(false)

}

But in does not work. I have configure the behavior to my project and custom field as in example here https://scriptrunner.adaptavist.com/latest/jira/behaviours-overview.html?utm_source=product-help 

What I'm doing wrong ?

Thanks in advance !

[Thierry Dalon · Accepted solution]

Look here for an example of code: https://community.atlassian.com/t5/Jira-questions/Copy-custom-field-user-object-to-sub-task-using-script-runner/qaq-p/618384

It comes from this part in the documentation https://docs.adaptavist.com/sr4js/latest/features/behaviours/behaviours-examples/sub-task-default-field