private void fixStartEnd( Properties properties, Set<String> jsonUIKeys, String startKey, String endKey, String key ) {
		if( jsonUIKeys.contains( startKey ) && jsonUIKeys.contains( endKey ) )
			put( properties, key, "$" + startKey );
	}
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