reactor-core/src/main/java/reactor/core/publisher/Operators.java
public static Throwable onOperatorError(Throwable error, Context context) {
		return onOperatorError(null, error, context);
	}
public static Throwable onOperatorError(Throwable error, Context context) {
		return onOperatorError(null, error, context);
	}
Map an "operator" error. The
result error will be passed via onError to the operator downstream after
checking for fatal error via
{@link Exceptions#throwIfFatal(Throwable)}.

@param error the callback or operator error
@param context a context that might hold a local error consumer
@return mapped {@link Throwable}