src/main/java/org/seedstack/jpa/internal/specification/JpaTranslationContext.java
public <E> void setExpression(Expression<E> expression) {
        Preconditions.checkState(this.expression == null, "An expression is already set");
        this.expression = expression;
    }
public <E> void setExpression(Expression<E> expression) {
        Preconditions.checkState(this.expression == null, "An expression is already set");
        this.expression = expression;
    }
Sets the expression currently active in the building context.

@param expression the expression.
@param <E>        the type of the expressions.