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## com.bea.p13n.expression
Interface Unifier

    public interface Unifier

An interface implemented by classes that can unify (replace occurrences of a variable with a value) an expression.
The unification process is a stateful operation in that the underlying expression is modified (by assigning variables to values).

Method Summary
`void` | `unify(Expression expression)` Performs the unification on the supplied expression.

Method Detail

### unify

    void unify(Expression expression)
               throws ExpressionException

  Performs the unification on the supplied expression.

  Parameters
    `expression` - the expression to be unified.
  Throws
    `ExpressionException` - if the unification fails.

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