Special character in custom field name : is there a limitation in Jira ?

I have to write an add-on for Jira (in java) that needs an access to a custom field.

If this custom field contains a ‘/’, getCustomFieldObjectByName always returns null.

For example :

CustomField cf = customFieldManager.getCustomFieldObjectByName("Model/s");

// cf is null

If “Model/s” is renamed in “Model”, then the method returns a valid customField.

CustomField cf = customFieldManager.getCustomFieldObjectByName("Model");

// cf is ok

Is there a way to escape the ‘/’ ?