[ISSUE] Error parsing Databricks Error #260

[costichiulan]

Issue Description

Exceptions are not deserialized correctly, the message field contains the response JSON and the string 'Cannot construct instance of com.databricks.sdk.core.error.ErrorDetail, problem: Cannot invoke "Object.getClass()" because "m" is null'

Changes

In ErrorDetails class, i added a null check before the unmodifiableMap is created.

Tests

Created an unit test in ApiErrorBodyDeserializationSuite.java