network, you should also make sure that it provides a way for users to
get its source.  For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code.  There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.

pkg go/ast, type InterfaceType struct, Methods *FieldList
pkg go/ast, type KeyValueExpr struct
pkg go/ast, type KeyValueExpr struct, Colon token.Pos
pkg go/ast, type KeyValueExpr struct, Key Expr
pkg go/ast, type KeyValueExpr struct, Value Expr
pkg go/ast, type LabeledStmt struct
pkg go/ast, type LabeledStmt struct, Colon token.Pos
pkg go/ast, type LabeledStmt struct, Label *Ident
pkg go/ast, type LabeledStmt struct, Stmt Stmt

pkg go/token, const ARROW = 36
pkg go/token, const ASSIGN = 42
pkg go/token, const BREAK = 61
pkg go/token, const CASE = 62
pkg go/token, const CHAN = 63
pkg go/token, const CHAR = 8
pkg go/token, const COLON = 58
pkg go/token, const COMMA = 52
pkg go/token, const COMMENT = 2
pkg go/token, const CONST = 64
pkg go/token, const CONTINUE = 65
pkg go/token, const DEC = 38
pkg go/token, const DEFAULT = 66