Blurb::
Name the method block; helpful when there are multiple

Description::
The method identifier string is supplied with \c id_method and is used
to provide a unique identifier string for use with environment or
meta-iterator specifications (refer to \ref environment). It is
appropriate to omit a method identifier string if only one method is
included in the input file, since the single method to use is
unambiguous in this case.

Topics::	block_identifier, method_independent_controls
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