Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DataSetParameterHandle.java
return (Integer) getProperty( DataSetParameter.NATIVE_DATA_TYPE_MEMBER );
	}
	/**
	 * Sets the parameter native data type.
	 * 
	 * @param dataType
	 *            the native data type to set.
	 */
	public void setNativeDataType( Integer dataType )
	{
		setPropertySilently( DataSetParameter.NATIVE_DATA_TYPE_MEMBER, dataType );
	}
	/**
	 * Represents the member handle which handles the "name" member in the data
	 * set parameter structure.
	 */
	final static class NameMemberHandle extends MemberHandle
	{
		DataSetParameterHandle paramHandle = null;
		/**
		 * Constructs a member handle with the given structure handle and the
		 * member property definition.
		 * 
		 * @param structHandle
		 *            a handle to the structure
		 * @param member
		 *            definition of the member within the structure
		 */
		public NameMemberHandle( StructureHandle structHandle,
				StructPropertyDefn member )