when a rule uses a java class in a pattern:

package my.test;
import org.drools.Cheese;
rule R when Cheese() then end

a TypeDeclaration for that class (e.g.Cheese) is created, but is assigned
to the rule package ("my.test") rather than to the natural class package
("org.drools"). This prevents an efficient later lookup of the typeDeclaration
using the class name as a key.