I broke up with neovim....vim is my best friend now

dot_vim/plugged/vimtex/test/test-toc/main.tex

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+\documentclass{book}
+\usepackage{subfiles}
+\usepackage{import}
+
+\input{./chapters/preamble}
+\import{chapters}{imported.tex}
+
+\title{Test file.}
+\author{Tester Testington}
+
+\begin{document}
+\maketitle
+
+\chapter{Chapter in main}
+\subfile{chapters/subfile.tex}
+
+\begin{quote}
+  A custom environment.
+\end{quote}
+
+\input{./chapters/chapter}
+
+\input{./chapters/equations}
+\end{document}