public BooleanExpression or(@Nullable Predicate right) {
        right = (Predicate) ExpressionUtils.extract(right);
        if (right != null) {
            return Expressions.booleanOperation(Ops.OR, mixin, right);
        } else {
            return this;
        }
    }
Create a {@code this || right} expression

<p>Returns a union of this and the given expression</p>

@param right right hand side of the union
@return this || right
querydsl-core/src/main/java/com/querydsl/core/types/dsl/BooleanExpression.java