Function fnInfo

fnInfo(
    name: Identifier,
    ctx: ReadOnlyFlowrAnalyzerContext,
    version?: string,
): FnInfo | undefined
The one place to ask what flowR knows about a function by name: one of its own built-ins, a package function the signature database carries, or both. What the built-in states wins wherever the two overlap, exactly as queryFnProps joins them. undefined when neither has anything to say about the name.
Parameters
- name: Identifier
  The function to ask about, qualified (Identifier.make('lead', 'dplyr')) to pin the package down.
- ctx: ReadOnlyFlowrAnalyzerContext
  The analyzer context the built-ins, the database and the assumed versions come from.
- Optionalversion: string
  The package version to answer for, the one the analysis assumes if omitted.
Returns FnInfo | undefined
See
fnInfoLookup - to ask the same question for many names
Example
```
const ctx = analyzer.inspectContext();
fnInfo(Identifier.make('lead', 'dplyr'), ctx)?.parameters; // ['x', 'n', 'default', 'order_by', '...']
fnInfo(Identifier.make('nchar'), ctx)?.foldable;           // true, flowR folds it itself
```
- Defined in src/dataflow/environments/query-fn-props.ts:215