This is a test feature to develop an easier way for creating new presets and mappaint styles.
{{{#!style
meta 
{
    title: "Modified";
    
    watch-modified: true;
}

node:modified::modified_layer 
{
    symbol-shape: circle;
    symbol-size: 50;
    symbol-fill-color: lime;
    symbol-fill-opacity: 0.3;
    z-index: -5;
}

way:modified::modified_layer,
node:modified < way::modified_layer 
{
    width: 40;
    color: lime;
    opacity: 0.3;
    z-index: -5;
}
}}}