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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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  how to write new ones.
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  how to write new ones.
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}
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}
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\section{Methods}{
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\section{Methods}{
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  \describe{
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  \describe{
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    \item{.Object = "ANY"}{
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    \item{\code{signature(.Object = "ANY")}}{
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      The default method for \code{initialize} takes either named or
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      The default method for \code{initialize} takes either named or
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      unnamed arguments.  Argument names must be the names of slots in
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      unnamed arguments.  Argument names must be the names of slots in
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      this class definition, and the corresponding arguments must be
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      this class definition, and the corresponding arguments must be
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      valid objects for the slot (that is, have the same class as
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      valid objects for the slot (that is, have the same class as
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      specified for the slot, or some superclass of that class).  If the
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      specified for the slot, or some superclass of that class).  If the
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      Then named arguments are processed.  Therefore, explicit values
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      Then named arguments are processed.  Therefore, explicit values
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      for slots always override any values inferred from superclass or
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      for slots always override any values inferred from superclass or
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      subclass arguments.
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      subclass arguments.
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    }
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    }
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    \item{.Object = "traceable"}{
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    \item{\code{signature(.Object = "traceable")}}{
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      Objects of a class that extends \code{traceable} are used to
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      Objects of a class that extends \code{traceable} are used to
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      implement debug tracing (see class \linkS4class{traceable} and
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      implement debug tracing (see class \linkS4class{traceable} and
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      \code{\link{trace}}).
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      \code{\link{trace}}).
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      The \code{initialize} method for these classes takes special
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      The \code{initialize} method for these classes takes special
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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{.Object = "environment"}{
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    \item{\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.
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    }
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    }
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    \item{.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
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      generic function with a \code{signature} slot to define the
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      generic function with a \code{signature} slot to define the
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      argument names.  See \link{Methods} for details.
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      argument names.  See \link{Methods} for details.
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    }
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    }