A code lens represents a {@link Command} that should be shown along with source text, like the number of references, a way to run tests, etc.
A code lens is unresolved when no command is associated to it. For performance reasons the creation of a code lens and resolving should be done to two stages.
@link CodeLensProvider.provideCodeLenses} @link CodeLensProvider.resolveCodeLens}
See also:
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