\begin{foobar}
\end{foobar}
\ref{foobar}
\cite{foobar}
\label{foobar}
\usepackage{foobar}
\documentclass[11px,twoside,a4paper]{foobar}

----------------------------------------------------

[
	["function", "\\begin"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\end"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\ref"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\cite"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\label"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\usepackage"], ["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"],
	["function", "\\documentclass"],
	["punctuation", "["], "11px,twoside,a4paper", ["punctuation", "]"],
	["punctuation", "{"],
	["keyword", "foobar"], ["punctuation", "}"]
]

----------------------------------------------------

Checks for keywords.