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\docType{class}
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\docType{class}
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\alias{character-class}
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\alias{character-class}
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\alias{complex-class}
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\alias{complex-class}
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\alias{double-class}
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\alias{double-class}
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\alias{expression-class}
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\alias{expression-class}
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\alias{externalptr-class}
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\alias{integer-class}
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\alias{integer-class}
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\alias{list-class}
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\alias{list-class}
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\alias{logical-class}
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\alias{logical-class}
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\alias{numeric-class}
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\alias{numeric-class}
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\alias{single-class}
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\alias{single-class}
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### is a virtual class, extended by all the above
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### is a virtual class, extended by all the above
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### The following are additional basic classes
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### The following are additional basic classes
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"NULL"     #  NULL objects
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"NULL"     #  NULL objects
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"function" #  function objects, including primitives
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"function" #  function objects, including primitives
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"externalptr" # raw external pointers for use in C code
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"ANY"  # virtual classes used by the methods package itself
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"ANY"  # virtual classes used by the methods package itself
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"VIRTUAL"
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"VIRTUAL"
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"missing"
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"missing"
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