How do I find locations and snippets in a folder that are similar to the specified code snippet?

Now I have a code snippet. like it: 
```
const targetFunc = (a, b, c) => {
  return a + b  + c
}
```

I need find the code locations similar to function `targetFunc` in src. how I can do it ?

- src/a.js
```
const sum3 = (a, b, c) => {
  return a + b  + c
}

sum3(1, 2, 3)
```

- src/b.js
```
const sum = (a, b) => {
  return a + b
}

sum(2, 3)
```