Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/FilterConditionHandle.java
setValue1( value1Expr );
	}
	/**
	 * Returns the value 2 expression of this filter condition.
	 * 
	 * @return the value 2 expression.
	 * 
	 * @deprecated Replaced by the method {@link #getValue2()}
	 */
	public String getValue2Expr( )
	{
		return getValue2( );
	}
	/**
	 * Sets the value 2 expression of this filter condition.
	 * 
	 * @param value2Expr
	 *            the value 2 expression to set
	 * 
	 * @deprecated Replaced by the method {@link #setValue2(String)}
	 */
	public void setValue2Expr( String value2Expr )
	{
		setValue2( value2Expr );
	}
	/**
	 * Returns the filter target. The possible values are defined in
	 * {@link org.eclipse.birt.report.model.api.elements.DesignChoiceConstants},
	 * and they are:
	 * <ul>