main package.
Example:
package myPackage
func MyPackageGetIP() {
}
The MyPackageGetIP name will be highlighted as it starts with the package name.
According to
Package Names at github.com/golang,
all references to names in a package will be done using the package name, so one can omit that name from the identifiers.
For example, if you are in a package foo, you do not need a type FooFile,
which clients will write as foo.FooFile. Instead, we name the type File,
which clients will write as foo.File.