import "go/importer"
Package importer provides access to export data importers.
Default returns an Importer for the compiler that built the running binary. If available, the result implements types.ImporterFrom.
For returns an Importer for the given compiler and lookup interface, or nil. Supported compilers are "gc", and "gccgo". If lookup is nil, the default package lookup mechanism for the given compiler is used. BUG(issue13847): For does not support non-nil lookup functions.
type Lookup func(path string) (io.ReadCloser, error)
A Lookup function returns a reader to access package data for a given import path, or an error if no matching package is found.
☞ For does not support non-nil lookup functions.