Modifying parseSettings/VisualSettings

Hello,

A newly created visual comes with a static parseSettings method, which calls VisualSettings.parse(). If I inspect the return value of this call then it is a VisualSettings instance with a property called "dataPointSettings", which itself has properties like "defaultColor", "fontSize", etc. My question is where are these defined? I'd like to be able to modify these values but I can't find any class called VisualSettings in my source code.

Thank you.