nl_tokens: Computes styles for base pairs which are rendered as letters .
pl_tokens: function TEXT_STYLE ( mode : number , fontSize : number ) : <mask> { if ( mode == DisplayMode . LOOSE ) { return ` ${ fontSize } ` ; } else if ( mode == DisplayMode . TIGHT ) { return ` ${ fontSize } ` ; } else { return ` ${ fontSize } ` ; } }