Function isConditionValid

isConditionValid(condition): boolean
JMap.Layer.DynamicFilter.isConditionValid

Returns a string error (human readable) if the condition is not correct.

If correct returns undefined.

It doesn't check the id of the condition.
Parameters
- condition: JDynamicFilterCondition
  The condition to verify
Returns boolean
Example
```
// log in console a message if the condition is not valid
if (!JMap.Layer.DynamicFilter.isConditionValid(myCondition)) {
 console.log("Condition is not valid")
}
```