Issue created from TODO on lines 93 and 94 of BaseCustomizableData.java and BaseCustomizableMetadata.java
- Convenience method that voids all existing attributes of the given type, and sets this new one.
- TODO fail if minOccurs > 1
- TODO decide whether this should require maxOccurs=1
- @should void the attribute if an attribute with same attribute type already exists and the maxOccurs is set to 1
- @param attribute