ByID is helper type for sorting selectors by ID.

ByPackageName is a helper type for sorting PackageStats by Name.

Deps is a shorthand for Dependencies - a slice of Selectors.

Package represents package info, needed for this tool.

PackageStat holds stats about dependencies in a given package.

Result holds final result of this tool.

Selector represents Go language selector (x.f), which may be: - method of variable of external package - function from the external package - variable

Totals represnts total stats for all packages.

Walker holds all information needed during walking and analyzing AST source tree.