Escape escapes instances of '\' and '*' with a backslash.

NewMatcher creates a matcher that will use the given list patterns to match namespaces.

NewRenamer creates a Renamer that will use the given from and to slices to map namespaces.

Unescape removes the escaping backslash where applicable.

Matcher identifies namespaces given user-defined patterns.

Renamer maps namespaces given user-defined patterns.