How to add round edges rectangle nodes

Hello, everyone! I am new to Graphviz. Please, what parameter can add a round edge to the rectangle node as shown in the picture attached?
image

use: style=rounded (style | Graphviz)
Like so:
MyNode [style=rounded label=“gini = 123\nsamples = 98765\nvalue = [123, 321]”]

Thank you so much. I already got the syntax.