anyMultibyteUTF8Characters
                        Check If a String Contains Multibyte UTF-8
                        characters
getLatexStrWidth        Obtain Font Metrics from LaTeX
gridToDevice            Convert grid coordinates to device coordinates
sanitizeTexString       Replace LaTeX Special Characters in a String
setTikzDefaults         Reset tikzDevice options to default values.
tikz                    TikZ Graphics Device
tikzAnnotate            Add Custom TikZ Code to an Active Device
tikzCompilerInfo        Print paths to TeX compilers.
tikzDevice-package      Support for native LaTeX output of R graphics
tikzTest                Test invocation of a LaTeX engine.
