getFunction method
Returns the function with the given functionName
.
If a function with named functionName
cannot be
found, this will return null
.
Implementation
JsonWidgetFunction? getFunction(String? functionName) {
JsonWidgetFunction? function;
if (functionName != null) {
function = _functions[functionName];
function ??= _parent?.getFunction(functionName);
}
return function;
}