inputs to the step method at the beginning of initialization.
Validation includes checking data types, complexity, cross-input validation,
and validity of inputs controlled by a property value.
validateInputsImpl is called by the setup method
before setupImpl. validateInputsImpl executes
You must set Access=protected for this method.
You cannot modify any properties in this method. Use the processTunedPropertiesImpl method
or setupImpl method to modify properties.