private void put( Properties properties, Object key, Object value ) {
		if( value != null )
			properties.put( key, value );
		else
			properties.remove( key );
	}
Loads a IntelliJ .theme.json file from the given input stream.

The input stream is automatically closed.
Using a buffered input stream is not necessary.
flatlaf-core/src/main/java/com/formdev/flatlaf/IntelliJTheme.java