question: creates a metadata instance from json ast . concode_field_sep PlaceHolder placeHolder concode_field_sep boolean[] getBooleanArray concode_elem_sep org.apache.spark.sql.catalyst.util.Metadata getMetadata concode_elem_sep org.json4s.JsonAST.JValue jsonValue concode_elem_sep double getDouble concode_elem_sep java.lang.String getString concode_elem_sep org.apache.spark.sql.catalyst.util.Metadata empty concode_elem_sep long[] getLongArray concode_elem_sep long getLong concode_elem_sep double[] getDoubleArray concode_elem_sep org.apache.spark.sql.catalyst.util.Metadata[] getMetadataArray concode_elem_sep boolean contains concode_elem_sep org.json4s.JsonAST.JValue toJsonValue concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep T get concode_elem_sep org.apache.spark.sql.catalyst.util.Metadata fromJson concode_elem_sep java.lang.String json concode_elem_sep boolean getBoolean concode_elem_sep java.lang.String[] getStringArray concode_elem_sep java.lang.String toString concode_elem_sep scala.collection.immutable.Map<java.lang.String,java.lang.Object> map concode_elem_sep int hash
target: org . apache . spark . sql . catalyst . util . Metadata function ( org . json4s . JsonAST . JObject arg0 ) { throw new RuntimeException ( ) ; }