Bug 173902 remove EXPERIMENTAL markings from 3.3 IDE Undo API
Need to remove the EXPERIMENTAL javadoc from the new API I introduced in 3.3. See org.eclipse.ui.ide.undo org.eclipse.jface.fieldassist
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
*/
	public void setQuietCompute(boolean quiet) {
		quietCompute = quiet;
	}
	/*
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		StringBuffer text = new StringBuffer(super.toString());
		text.append("\n"); 
		text.append(this.getClass().getName());
		appendDescriptiveText(text);
		return text.toString();
	}
	/**
	 * Append any descriptive text to the specified string buffer to be shown in
	 * the receiver's {@link #toString()} text.
	 * 
	 * @param text
	 *            the StringBuffer on which to append the text
	 */
	protected void appendDescriptiveText(StringBuffer text) {
		text.append(" resources: "); 
		text.append(resources);
		text.append('\'');
	}
	/**
	 * Return the shell described by the specified adaptable, or the active
	 * shell if no shell has been specified in the adaptable.
	 *