Github user avafanasiev commented on the pull request:
https://github.com/apache/groovy/commit/c24c0b7e6a67dcdf277207d4261cfa6f2b55031f#commitcomment-27230133
In src/main/java/org/codehaus/groovy/classgen/asm/InvocationWriter.java:
In src/main/java/org/codehaus/groovy/classgen/asm/InvocationWriter.java on
line 483:
1. Is it acceptable groovy method dispatch depends on declared type?
```
class R implements Runnable { def run(){}}
def m(Runnable r1, R r2, r3) {
r1()
r2()
r3()
}
m(new R(), new R(), new R())
```
2. SAM types doesn't have to contain `@FunctionalInterface`. I think this
check contradicts its
[documentation](https://docs.oracle.com/javase/9/docs/api/java/lang/FunctionalInterface.html)
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