code: public boolean getBoolean(String name, boolean defaultValue) {
          String valueString = get(name);
          return "true".equals(valueString) || !"false".equals(valueString) && defaultValue;
      }
docs: Get the value of the <code>name</code> property as a <code>boolean</code>.
  If no such property is specified, or if the specified value is not a valid
  <code>boolean</code>, then <code>defaultValue</code> is returned.
  
  @param name property name.
  @param defaultValue default value.
  @return property value as a <code>boolean</code>,
  or <code>defaultValue</code>.