ValidateFlows validates wether the graph of Flows is legal or not For every Flow, it should obey the following rules: - Has one and only one entrance - Has one and at least one exit - Every Flow in Inputs & Outputs should have been defined in []Flow - If a Flow has a Condition, every Flow in Condition.Destination should have been defined in Outputs.

ValidateFuncExist validates that each Function declared in the workflow has been defined in Function CRD, or it will return error.