def add_layer(self, label, change_layer=True):
self.layer_stack.insert(self.last_layer() + <NUM_LIT:1>, label)<EOL>if change_layer:<EOL><INDENT>self.set_current_layer(self.last_layer())<EOL><DEDENT>return None<EOL>
Add new mesh layer to the end of the stack

        Args:
            label (str): new label for the mesh layer
            change_layer (bool): change to the newly created layer