Add global variables to workflows

Hi, can you give a example of setting and using the variables I tried this but had no luck

im using this to set the variable

// First, initialize workflowContext.globals if it's undefined
if (!workflowContext.globals) {
workflowContext.globals = {};
}

// Optionally set the value
workflowContext.globals.fulfillmentMethod = workflowContext.globals.fulfillmentMethod || "fbb";

// Return the value
return workflowContext.globals.fulfillmentMethod;

result: {"data":"fbb"}

then use this to return the variable

if (!workflowContext.globals) {
workflowContext.globals = {};
}
return workflowContext.globals.fulfillmentMethod || "not set";

result: {"data":"not set"}