This class represents a filter function. We are using this class for creation of complex filters that can contain filter functions as values. Nesting function as other functions parameter is supported.
| OpenLayers. | This class represents a filter function. | 
| Properties | |
| name | {String} Name of the function. | 
| params | {Array(OpenLayers.Filter.Function || String || Number)} Function parameters For now support only other Functions, String or Number | 
| Constructor | |
| OpenLayers. | Creates a filter function. | 
{Array(OpenLayers.Filter.Function || String || Number)} Function parameters For now support only other Functions, String or Number