docs: function interpolateCSSText(text, cssText) {
          // CSS text
          var stylesheetHTML = '<style>' + cssText + '</style>';
  
          // If using Firefox with no subpx support, add "text-rendering" CSS.
          // @NOTE(plai): We are not adding this to Chrome because Chrome supports "textLength"
          // on tspans and because the "text-rendering" property slows Chrome down significantly.
          // In Firefox, we're waiting on this bug: https://bugzilla.mozilla.org/show_bug.cgi?id=890692
          // @TODO: Use feature detection instead (textLength)
          if (browser.firefox && !subpx.isSubpxSupported()) {
              stylesheetHTML += '<style>text { text-rendering: geometricPrecision; }</style>';
          }
  
          // inline the CSS!
          text = text.replace(inlineCSSRegExp, stylesheetHTML);
  
          return text;
      }