Bug 151959 inappropriate screen operation
steps to reproduce: - create a report - add a grid item (3x3) - switch to Outline view - expand the grid item to see its rows and cells - select the grid item, and drag it into any of its own cell expected behavior: - is it an invalid screen operation? if it is, it should be banned actual behavior: - the grid item was disappeared surprisingly
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
return null;
		return StringUtil.buildQualifiedReference( extendsRef
				.getLibraryNamespace( ), extendsRef.getName( ) );
	}
	/**
	 * Returns the optional element name.
	 * <p>
	 * Part of: The name system.
	 * 
	 * @return Returns the name.
	 */
	public String getName( )
	{
		return name;
	}
	/**
	 * Sets the element name. The caller must have cleaned up any references to
	 * the old name, have changed any name spaces as needed, have verified the
	 * name, and so on.
	 * <p>
	 * Part of: The name system.
	 * 
	 * @param newName
	 *            The name to set.
	 */
	public void setName( String newName )
	{
		name = newName;
	}
	/**