gistfile1.txt

    String cls = ClassBuilder.implement(Bootstrapper.class)
            .publicMethod(InterfaceInjectionContext.class, "bootstrapContainer")
               .append(Stmt.create().addVariable("ctx", Stmt.create().newObject(InterfaceInjectionContext.class)))
               .append(Stmt.create().loadVariable("ctx").returnValue())
            .finish().toJavaString();


---[output]----

package org.jboss.errai.ioc.client.api;

public class BootstrapperImpl implements org.jboss.errai.ioc.client.api.Bootstrapper {
    public org.jboss.errai.ioc.client.InterfaceInjectionContext bootstrapContainer() {
        org.jboss.errai.ioc.client.InterfaceInjectionContext ctx = new org.jboss.errai.ioc.client.InterfaceInjectionContext();
        return ctx;
    }
}