Given the following specification:

info:
  title: Example API
  version: '1.0'
openapi: 3.0.0
components:
  schemas:
    MyType:
      x-type-metadata:
        type-metadata-1: type md 1 value
        type-metadata-2: type md 2 value
      type: object
      properties:
        myProperty:
          type: string
          x-field-metadata:
            field-metadata-1: field md 1 value
            field-metadata-2: field md 2 value

and the following code to generate the Pydantic model:

generate(
    openapi_yaml,
    input_file_type=InputFileType.OpenAPI,
    output_model_type=DataModelType.PydanticV2BaseModel,
    target_python_version=PythonVersion.PY_312,
    use_double_quotes=True,
    disable_timestamp=True,
    set_default_enum_member=True,
    collapse_root_models=True,
    allow_extra_fields=False,
    use_schema_description=True,
    use_field_description=True,
    field_extra_keys_without_x_prefix={
        "x-type-metadata",
        "x-field-metadata",
    },
)

Generates the following:

# generated by datamodel-codegen:
#   filename:  <stdin>

from __future__ import annotations

from typing import Optional

from pydantic import BaseModel, Field


class MyType(BaseModel):
    myProperty: Optional[str] = Field(
        None,
        json_schema_extra={
            "field-metadata": {
                "field-metadata-1": "field md 1 value",
                "field-metadata-2": "field md 2 value",
            }
        },
    )

It would be very useful to have the type level "x-*" (in the above example "x-type-metadata") metadata included in the generated code in a similar way that the field metadata is preserved in the json_schema_extra property.