If a resolve function is not given, then a default resolve behavior is used which takes the property of the source object of the same name as the field and returns it as the result, or if it's a function, returns the result of calling that function while passing along args and context value.

If a resolveType function is not given, then a default resolve behavior is used which attempts two strategies:

Data that must be available at all points during query execution.

Prepares an object map of argument values given a directive definition and a AST node which may contain directives. Optionally also accepts a map of variable values.

Given a Path, return an Array of the path keys.