extraFields() public method
Returns the list of fields that can be expanded further and returned by toArray().
This method is similar to fields() except that the list of fields returned by this method are not returned by default by toArray(). Only when field names to be expanded are explicitly specified when calling toArray(), will their values be exported.
The default implementation returns an empty array.
You may override this method to return a list of expandable fields based on some context information (e.g. the current application user).
See also:
| public array extraFields ( ) | ||
|---|---|---|
| return | array |
The list of expandable field names or field definitions. Please refer to fields() on the format of the return value. |
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