public void setAllowIndeterminate( boolean allowIndeterminate ) {
		this.allowIndeterminate = allowIndeterminate;
	}
Sets whether indeterminate state is allowed.
<p>
This affects only the user when clicking on the checkbox.
Setting state to indeterminate via API is always allowed.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTriStateCheckBox.java