How do you stop Eclipse from inserting a certain class in Content-Assist?

I'm using SpringSource Tool Suite (Eclipse) to program with Grails, and I'm also using JFreechart in the program.

In Grails you log by typing log.info("method worked"). Unfortunately JFrechart has a class called "Log" with Static methods like "info". This means that in STS I type log.info and then when I type space or ( Eclipse "assists" me by importing the JFreechart开发者_开发技巧 Log class and changing what I've typed to Log.info(message). Very irritating.

I reckon I could turn off the Eclipse option to "insert single proposals automatically", but I like this feature. Can I instruct Eclipse not to give me content assist from this particular JFreechart class?

You can add the JFreechart Log class to Type Filters via Window > Preferences > Java > Appearance > Type Filters:

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