Function parameter

parameter(
    name: string,
    location: SourceRange,
    defaultValue?: RNode,
    special?: boolean,
): RParameter
A function parameter.
Parameters
- name: string
  the parameter's name
- location: SourceRange
  where the name is written
- OptionaldefaultValue: RNode
  what it falls back to, absent for a parameter without one
- special: boolean = false
  whether this is the ... parameter
Returns RParameter
- Defined in test/functionality/_helper/ast-builder.ts:37