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\alias{initialize-methods}
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\alias{initialize-methods}
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\alias{initialize,ANY-method}
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\alias{initialize,ANY-method}
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\alias{initialize,traceable-method}
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\alias{initialize,traceable-method}
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\alias{initialize,signature-method}
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\alias{initialize,signature-method}
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\alias{initialize,environment-method}
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\alias{initialize,environment-method}
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\alias{initialize,.environment-method}
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\description{
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\description{
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  The arguments to function \code{\link{new}} to create an object from a
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  The arguments to function \code{\link{new}} to create an object from a
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  particular class can be interpreted specially for that class, by the
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  particular class can be interpreted specially for that class, by the
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  definition of a method for function \code{initialize} for the class.
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  definition of a method for function \code{initialize} for the class.
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  This documentation describes some existing methods, and also outlines
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  This documentation describes some existing methods, and also outlines
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      is the object to use as the original definition (e.g., a
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      is the object to use as the original definition (e.g., a
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      function).  The others correspond to the arguments to
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      function).  The others correspond to the arguments to
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      \code{\link{trace}}.
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      \code{\link{trace}}.
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    }
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    }
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    \item{\code{signature(.Object = "environment")}}{
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    \item{\code{signature(.Object = "environment")}, \code{signature(.Object = ".environment")}}{
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      The \code{initialize} method for environments takes a named list
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      The \code{initialize} method for environments takes a named list
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      of objects to be used to initialize the environment.
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      of objects to be used to initialize the environment.  Subclasses
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      of \code{"environment"} inherit an initialize method through
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      \code{".environment"}, which has the additional effect of
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      allocating a new environment.  If you define your own method for
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      such a subclass, be sure either to call the existing method via
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      \code{\link{callNextMethod}} or allocate an environment in your
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      method, since environments are references and are not duplicated
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      automatically.
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    }
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    }
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    \item{\code{signature(.Object = "signature")}}{
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    \item{\code{signature(.Object = "signature")}}{
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      This is a method for internal use only.
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      This is a method for internal use only.
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      It takes an optional \code{functionDef} argument to provide a
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      It takes an optional \code{functionDef} argument to provide a