Check if the given $exprStmt can be inlined or not. If it can, returns an object with information important for inlining, otherwise returns undefined.
A call can be inline if the following rules apply:
An object with the properties below or undefined if this exprStmt cannot be inlined.
Object with options. Supported options: 'prefix' (default: "__inline"), the prefix that will be used in the name of variables inserted by the Inliner