Facing issue in disabling the option "Review Purchased item details" based on custom role

Summary:On work order UI , we have seen one option is there with the name “Review purchase item details”.We have tried to visible this icon only to specific role holder “YCC_Maintenance_Inspector_Custom”

Due to which ,we have created one sand box page with an expression builder query highlighted in yellow:  “#{!securityContext.userInRole['YCC_Maintenance_Inspector_Custom']}

 

Issue: We have apply the above expression to the existing one .But, this is appearing with some rename of text “true”

Content (required):Hence: Please suggest us the correct expression , so that this will not renamed to any other name . Just greyed for employee with role ““YCC_Maintenance_Inspector_Custom”