You may start from the below suggestion:
public static server void createNewRole(Args _args)
{
#AOT
TreeNode treeNode;
TreeNode roleTreeNode;
TreeNode privilegeTreeNode;
TreeNode subPrivilegeTreeNode;
str roleName;
str privilegeName;
;
roleName = "TestRole";
privilegeName = "InventItemGroupView";
treeNode = TreeNode::findNode(#SecRolesPath + '\\' + roleName);
if(!treeNode)
{
treeNode = TreeNode::findNode(#SecRolesPath);
if (treeNode != null)
{
roleTreeNode = treeNode.AOTadd(roleName);
if(roleTreeNode != null)
{
privilegeTreeNode = roleTreeNode.AOTfindChild('Privileges');
subPrivilegeTreeNode = privilegeTreeNode.AOTfindChild(privilegeName);
if(subPrivilegeTreeNode == null)
{
subPrivilegeTreeNode = privilegeTreeNode.AOTAdd(privilegeName);
subPrivilegeTreeNode.AOTcompile();
subPrivilegeTreeNode.AOTsave();
}
roleTreeNode.AOTcompile();
roleTreeNode.AOTsave();
}
}
}
}