private void putAll( Properties properties, Object value, String... keys ) {
		for( String key : keys )
			put( properties, key, value );
	}
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