import org.argeo.slc.execution.ExecutionModuleDescriptor;
import org.argeo.slc.execution.ExecutionSpec;
import org.argeo.slc.execution.ExecutionSpecAttribute;
+import org.argeo.slc.execution.FlowConfigurationException;
import org.argeo.slc.execution.RefSpecAttribute;
import org.argeo.slc.execution.RefValue;
import org.argeo.slc.primitive.PrimitiveSpecAttribute;