code: public SDVariable isNumericTensor(String name, SDVariable x) {
          SDVariable result = f().isNumericTensor(x);
          return updateVariableNameAndReference(result, name);
      }
docs: Is the director a numeric tensor? In the current version of ND4J/SameDiff, this always returns true/1
  
  @param name Output variable name
  @param x    Input variable
  @return Scalar variable with value 1