Rules for AIP-136, covering custom methods.
|http-body||Custom methods must have the HTTP body set to `*`.|
|http-method||Custom methods must use the POST or GET HTTP verb.|
|http-name-variable||Custom methods should only use `name` if the RPC noun matches the resource.|
|http-parent-variable||Custom methods should only use `parent` if the RPC noun matches the resource.|
|http-uri-suffix||Custom methods should have a correct URI suffix.|
|prepositions||Custom methods must not include prepositions in their names.|
|standard-methods-only||Declarative-friendly resources should eschew custom methods.|
|verb-noun||Custom methods should be named with the verb, then the noun.|
Note: Because AIPs sometimes cover topics that have some overlap, some rules related to custom methods may be included in the rules for other AIPs.