Ignores classes matched by {@code pattern}. Ignored classes are not touched by Contracts for Java in any way: they are neither loaded nor examined for contracts.
If you are looking for a method to disable contracts, this is not the right method; use methods such as {@link #disableInvariants(String)} instead.
By default, the following classes are ignored:
- {@code java.*}
- {@code javax.*}
- {@code com.sun.*}
- {@code sun.*}