Method setFieldToX

src/test/resources/sideeffect/OOP.java:19–19

(Tree x)

    OOP field2 = new OOP();

    public void setFieldToX(Tree x) { this.field1 =  x; }
    public void setXFieldToField(OOP x) { x.field2 =  this.field2; }
    public void setXFieldToThis(OOP x) { x.field2 =  this; }
    public OOP returnThis() { return this; }