public BooleanExpression startsWith(Expression<String> str) {
        return Expressions.booleanOperation(Ops.STARTS_WITH, mixin, str);
    }
Create a {@code this.startsWith(str)} expression

<p>Return true if this starts with str</p>

@param str string
@return this.startsWith(str)
@see java.lang.String#startsWith(String)
querydsl-core/src/main/java/com/querydsl/core/types/dsl/StringExpression.java