operator [] method
Get variable value
Implementation
operator [](String variableName) {
if (_pExpression == 0) throw ClearedExpressionException();
final pVariableName = _variableNames[variableName];
if (pVariableName != null) {
return FlutterExprtkPlatform.instance.getVar(pVariableName, _pExpression);
} else {
throw UninitializedVariableException();
}
}