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

dot_vim/plugged/vimtex/test/test-completion-commands/test-custom-cmds.tex

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+\documentclass{article}
+\usepackage{glossaries}
+\usepackage{mathtools}
+\usepackage{xparse}
+
+% Custom glossary commands 1
+\glsaddkey
+  {maccusative}          % key
+  {}                     % default value
+  {\glsentrymaccusative} % no link cs
+  {\Glsentrymaccusative} % no link ucfirst cs
+  {\glsmacc}             % link cs
+  {\Glsmacc}             % link ucfirst cs
+  {\GLSmacc}             % link all caps cs
+
+\DeclareDocumentCommand{\testddc}{ o m }{%
+first #1 second #2
+}
+
+% Custom glossary commands 2
+\glsaddkey{plural}{}
+  {\glsentryplural}
+  {\Glsentryplural}
+  {\glspl}
+  {\Glspl}
+  {\GLSpl}
+
+\let\testlet=\leftrightarrow
+
+\newcommand{\testnewcommand}{Hello world}
+
+\DeclarePairedDelimiter\testpaireddelim{\lvert}{\rvert}
+
+\begin{document}
+
+\end{document}