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  to environments and bindings within environments.  They allow for
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  to environments and bindings within environments.  They allow for
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  locking environments as well as individual bindings, and for linking
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  locking environments as well as individual bindings, and for linking
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  a variable to a function.
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  a variable to a function.
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}
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}
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\details{
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\details{
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  The function \code{lockEnvironment} locks its environment argument,
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  The function \code{lockEnvironment} locks its environment argument.
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  which must be a normal environment (not base).  (Locking the base
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  environment and namespace may be supported later.)  Locking the
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  Locking the
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  environment prevents adding or removing variable bindings from the
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  environment prevents adding or removing variable bindings from the
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  environment.  Changing the value of a variable is still possible unless
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  environment.  Changing the value of a variable is still possible unless
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  the binding has been locked.  The namespace environments of packages
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  the binding has been locked.  The namespace environments of packages
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  with namespaces are locked when loaded.
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  with namespaces are locked when loaded.
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