How to make Eclipse installed via snap use a differerent configuration when started from global menu

There are many possible solutions but the my favorite/simplest one is to use Menulibre:

Copy /snap/eclipse/current/eclipse.ini to somewhere you can edit it. Let us say, copy it to /etc/eclipse.ini.
Edit the arguments you want to update^[1] and save the file.
Open Menulibre^[2]
Search for "Eclipse."
Click in the Eclipse icon.
In the "Command" input, add the --launcher.ini option after the binary path. In our example, we would replace
```
 /snap/bin/eclipse %U
```
with
```
 /snap/bin/eclipse  --launcher.ini /etc/eclipse.ini %U
```
Click in Menulibre's "Save" button. I have only tested it on Unity and MATE, though, not sure it is going to work with GNOME 3.

So far, it is working to me.

Notes

^[1] I, for example, changed

    -Xms
    256m
    -Xmx
    1024m

    -Xms
    1024m
    -Xmx
    4096m

^[2] You may have to install it. A way to do it is to use APT:

$ sudo apt-get install menulibre