public void setSearchBase(String searchBase) {
        this.searchBase = searchBase;
    }
Used when initializing the default {@link LdapContextFactory}.  This property is ignored if a custom
<tt>LdapContextFactory</tt> is specified.

@param searchBase the search base.
core/src/main/java/org/apache/shiro/realm/ldap/AbstractLdapRealm.java