errors.forMethod(DoFn.GetInitialRestriction.class, getInitialRestriction.targetMethod()); TypeDescriptor<?> restrictionT = getInitialRestriction.restrictionT(); getInitialRestrictionErrors.checkArgument( errors.forMethod(DoFn.GetInitialRestriction.class, getInitialRestriction.targetMethod()); TypeDescriptor<?> restrictionT = getInitialRestriction.restrictionT(); processElementErrors.checkArgument(