Default theme viewer
Check out how the theme object looks like with the default values.
If you want to learn more about how the theme is assembled, take a look at material-ui/style/createTheme.js,
and the related imports which createTheme uses.
- breakpoints: Object
 - direction: "ltr"
 - components: Object
 - palette: Object
 - spacing: f spacing()
 - shape: Object
 - unstable_sxConfig: Object
 - unstable_sx: f sx()
 - mixins: Object
 - shadows: Array(25)
 - typography: Object
 - transitions: Object
 - zIndex: Object