code: def _svm_rbf_kernel_ast(estimator, sup_vec_value, to_reuse=False):
      return ast.ExpExpr(
          ast.BinNumExpr(
              ast.NumVal(-estimator.gamma),
              ast.PowExpr(
                  ast.BinNumExpr(
                      ast.NumVal(sup_vec_value),
                      ast.FeatureRef(0),
                      ast.BinNumOpType.SUB,
                  ),
                  ast.NumVal(2),
              ),
              ast.BinNumOpType.MUL,
          ),
          to_reuse=to_reuse,
      )
  
imports: from m2cgen import ast
label_desc: Use image node_id 2 for calling a global function with example usage: _svm_rbf_kernel_ast(estimator, sup_vec_value, to_reuse) and returns: ast