anyMultibyteUTF8Characters
                        Check If a String Contains Multibyte UTF-8
                        characters...
getLatexCharMetrics     Obtain LaTeX Font Metrics for Characters...
getLatexStrWidth        Obtain the Width of an Arbitrary LaTeX
                        String...
gridToDevice            Convert grid coordinates to device
                        coordinates...
sanitizeTexString       Replace LaTeX Special Characters in a String...
setTikzDefaults         Reset tikzDevice options.
tikz                    TikZ Graphics Device...
tikzAnnotate            Add Custom TikZ Code to an Active Device...
tikzDevice-package      Support for native LaTeX output of R graphics
