`args`
`as`
`by`
`case`
`config`
`connect`
`connector`
`const`
`copy`
`create`
`default`
`define`
`deploy`
`drop`
`each`
`emit`
`end`
`erase`
`event`
`flow`
`fn`
`for`
`from`
`group`
`having`
`insert`
`into`
`intrinsic`
`let`
`links`
`match`
`merge`
`mod`
`move`
`of`
`operator`
`patch`
`pipeline`
`recur`
`script`
`select`
`set`
`sliding`
`state`
`stream`
`to`
`tumbling`
`update`
`use`
`when`
`where`
`window`
`with`

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

[
	["identifier", "`args`"],
	["identifier", "`as`"],
	["identifier", "`by`"],
	["identifier", "`case`"],
	["identifier", "`config`"],
	["identifier", "`connect`"],
	["identifier", "`connector`"],
	["identifier", "`const`"],
	["identifier", "`copy`"],
	["identifier", "`create`"],
	["identifier", "`default`"],
	["identifier", "`define`"],
	["identifier", "`deploy`"],
	["identifier", "`drop`"],
	["identifier", "`each`"],
	["identifier", "`emit`"],
	["identifier", "`end`"],
	["identifier", "`erase`"],
	["identifier", "`event`"],
	["identifier", "`flow`"],
	["identifier", "`fn`"],
	["identifier", "`for`"],
	["identifier", "`from`"],
	["identifier", "`group`"],
	["identifier", "`having`"],
	["identifier", "`insert`"],
	["identifier", "`into`"],
	["identifier", "`intrinsic`"],
	["identifier", "`let`"],
	["identifier", "`links`"],
	["identifier", "`match`"],
	["identifier", "`merge`"],
	["identifier", "`mod`"],
	["identifier", "`move`"],
	["identifier", "`of`"],
	["identifier", "`operator`"],
	["identifier", "`patch`"],
	["identifier", "`pipeline`"],
	["identifier", "`recur`"],
	["identifier", "`script`"],
	["identifier", "`select`"],
	["identifier", "`set`"],
	["identifier", "`sliding`"],
	["identifier", "`state`"],
	["identifier", "`stream`"],
	["identifier", "`to`"],
	["identifier", "`tumbling`"],
	["identifier", "`update`"],
	["identifier", "`use`"],
	["identifier", "`when`"],
	["identifier", "`where`"],
	["identifier", "`window`"],
	["identifier", "`with`"]
]

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

Checks for variables.
