remeio commented on PR #1057:
URL: https://github.com/apache/commons-lang/pull/1057#issuecomment-1511262424
I agree the ` When returning a result, even specifying null is an
operation.` But in package `org.apache.commons.lang3.function`, there seems to
be some kind of agreement.
- NOP for Function: (t, u) -> null;
- NOP for Consumer: (t, u) -> {/* NOP */};
Such as For Function:
```java
public interface FailableBiFunction<T, U, R, E extends Throwable> {
/** NOP singleton */
@SuppressWarnings("rawtypes")
FailableBiFunction NOP = (t, u) -> null;
}
```
For Consumer:
```java
@FunctionalInterface
public interface FailableBiConsumer<T, U, E extends Throwable> {
/** NOP singleton */
@SuppressWarnings("rawtypes")
FailableBiConsumer NOP = (t, u) -> {/* NOP */};
}
```
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