'Check if the block is a no-op block by checking VEX statements.
:param vex_block: The VEX block instance.
:return: True if the entire block is a single-byte or multi-byte nop instruction, False otherwise.
:rtype: bool'

@staticmethod
def _is_noop_block(vex_block):

    if all(((type(stmt) is pyvex.IRStmt.IMark) for stmt in vex_block.statements)):
        return True
    return False
