code: def upgrade():
      with op.batch_alter_table("ab_view_menu") as batch_op:
          batch_op.alter_column(
              "name",
              existing_type=sa.String(length=100),
              existing_nullable=False,
              type_=sa.String(length=255),
              nullable=False,
          )
  
imports: import sqlalchemy
  from alembic import op
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types