Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/FilterConditionHandle.java
* @param filterExpr
	 *            the filter expression to set
	 * 
	 * @deprecated Replaced by the method {@link #setExpr(String)}
	 */
	public void setFilterExpr( String filterExpr )
	{
		setExpr( filterExpr );
	}
	/**
	 * Returns the value 1 expression of this filter condition.
	 * 
	 * @return the value 1 expression.
	 * 
	 * @deprecated Replaced by the method {@link #getValue1()}
	 */
	public String getValue1Expr( )
	{
		return getValue1( );
	}
	/**
	 * Sets the value 1 expression of this filter condition.
	 * 
	 * @param value1Expr
	 *            the value 1 expression to set
	 * 
	 * @deprecated Replaced by the method {@link #setValue1(String)}
	 */
	public void setValue1Expr( String value1Expr )
	{