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## org.apache.commons.digester3.substitution
Interface VariableExpander

All Known Implementing Classes:
  MultiVariableExpander

    public interface VariableExpander

An Interface describing a class capable of expanding strings which may contain variable references. The exact syntax of the "reference", and the mechanism for determining the corresponding value to be used is up to the concrete implementation.

Since:
  1.6

Method Summary
`String` | `expand(String param)` Return the input string with any variables replaced by their corresponding value.

Method Detail

### expand

    String expand(String param)

  Return the input string with any variables replaced by their corresponding value. If there are no variables in the string, then the input parameter is returned unaltered.

  Parameters:
    `param` - the string containing variables to be replaced.
  Returns:
    the input string with any variables replaced by their corresponding value.

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