@Override
  public boolean getBooleanValueOfVariable( String variableName, boolean defaultValue ) {
    if ( !Utils.isEmpty( variableName ) ) {
      String value = environmentSubstitute( variableName );
      if ( !Utils.isEmpty( value ) ) {
        return ValueMetaString.convertStringToBoolean( value );
      }
    }
    return defaultValue;
  }
@Test
  public void testGetBooleanValueOfVariable() {
    assertFalse( meta.getBooleanValueOfVariable( null, false ) );
    assertTrue( meta.getBooleanValueOfVariable( "", true ) );
    assertTrue( meta.getBooleanValueOfVariable( "true", true ) );
    assertFalse( meta.getBooleanValueOfVariable( "${myVar}", false ) );
    meta.setVariable( "myVar", "Y" );
    assertTrue( meta.getBooleanValueOfVariable( "${myVar}", false ) );
  }