Variable: THEME_NAMES

const THEME_NAMES: (
  | 'holochart'
  | 'plotly-classic'
  | 'holochart-dark'
  | 'plotly'
  | 'plotly_white'
  | 'plotly_dark'
  | 'simple_white'
  | 'ggplot2'
  | 'seaborn'
  | 'presentation'
  | 'xgridoff'
  | 'ygridoff'
  | 'gridon'
  | 'none'
  | 'high-contrast'
  | 'neon'
  | 'high-contrast-dark'
)[];

Names of the built-in themes, in the plan's order.